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https://jobs.arup.com/jobs/aviation-analyst-9522 Arup is proud to be recognized by Fast Company in their third annual Best Workplaces for Innovators list, which honors businesses and organizations that demonstrate a deep commitment to encouraging innovation at all levels. We find solutions for some of the world’s most complex problems. From climate action to social value, we consider the broadest impacts of our work. We strive to build a more sustainable, resilient, and equitable future. This purpose shapes our culture and has made us leaders in sustainable development. You’d be joining our multi-disciplinary design teams focusing on technical excellence and innovative solutions that create a better future for people, places, and the planet. Start Here, Go Anywhere! Want to work for a company that invests in innovation and people who catalyze impact in the built environment? Arup is proud to be recognized by Fast Company in their third annual Best Workplaces for Innovators list, which honors businesses and organizations that demonstrate a deep commitment to encouraging innovation at all levels. We find solutions for some of the world’s most complex problems. From climate action to social value, we consider the broadest impacts of our work. We strive to build a more sustainable, resilient, and equitable future. This purpose shapes our culture and has made us leaders in sustainable development. You’d be joining our multi-disciplinary design teams focusing on technical excellence and innovative solutions that create a better future for people, places, and the planet. During your career at Arup, you’ll have the chance to engage in a fulfilling career and work with some of the most highly respected engineers and specialists in the world. You’ll also get the opportunity to work on exciting and significant projects, delivering quality work that has a positive and lasting influence on the community and the environment. Responsibilities of this specific role will include, but not be limited to the following: • Perform capacity/demand assessment for planning studies using various tools, methods and techniques • Conduct passenger and baggage flow simulation modelling, interpret results and identify solutions • Develop spatial requirements and program development for infrastructure and facilities planning • Undertake data driven analysis to gather insights including research-based projects • Assist with development of automation tools using programming languages • Assist with development and review of forecast demand • Collect and collate data from surveys, benchmark studies and other sources as needed in support of planning studies • Assist in preparation of reports, presentations and deliverables including illustrations, tables and drawings to communicate complex technical ideas through a graphical and visual approach for a wide range of clients • Generate and contribute to planning and operational reports and provide advice to planning and design teams, airports and airline clients • Project work includes many of the most significant complex airport developments globally • Some travel may be required in the longer term Qualifications Required: • Bachelor’s degree (Master’s degree preferred) in Civil/Industrial/Operations Research/Transport engineering or other relevant disciplines • 2-5 years of increasingly responsible experience in airport planning and analysis • Knowledge/experience of analytical techniques and tools applied in airport planning including spreadsheet, database and simulation software such as Simio, CAST or others • Python or R or similar programming skills preferred • Proficiency in Microsoft Office applications (Word and PowerPoint); advanced Excel user • Demonstrated strong numeric analytical competence and strategic thinking capability • Good written and verbal communication skills essential for team-based working • Excellent planning and organization skills and attention to detail for our fast-paced environment • Must be highly motivated, proactive and willing to take on new challenges Arup is the creative force at the heart of many of the world's most prominent projects across our industry. We offer a broad range of professional services to clients around the world that combine to make a real difference to our clients and the communities in which we work. Notable Projects: • Toronto Pearson International Airport • Montreal Trudeau International Airport • New York John F. Kennedy International Airport • Chicago O’Hare International Airport • Los Angeles International Airport • Istanbul International Airport • London Heathrow International Airport • Singapore Changi International Airport Benefits that Work - At Arup, we have a comprehensive and valuable benefits program that works for our employees and their families. These are 100% paid for by Arup expect for optional life insurance. These benefits provide health and welfare security for you as well as paid time off for rest and renewal. Our Global Profit Share Plan (paid bi-annually) provides an opportunity for you to share in the success of the Firm. As a valued employee of Arup, you can also choose to participate in our GRRSP 5% company match to help you save for your future. COVID-19 Vaccination Requirement - Arup requires all new employees to be vaccinated for COVID-19. Arup is an equal opportunity employer and consistent with federal, state, and local requirements, will consider requests for reasonable accommodation based on disability or sincerely held religious beliefs where it is able to do so without undue hardship to Arup. Flexible Working - We believe that flexible arrangements create a more inclusive way of working that supports our diversity and the wellbeing of our people. Options for alternative schedules and the ability to work outside of the office for a portion of your workweek are available. Arup is an Equal Opportunity Employer. We consider all qualified candidates regardless of national origin, veteran, disability, sixual orientation, gender, gender identity or other status protected by law. If you need any assistance or accommodations due to a disability, please contact us at americasbenefits@arup.com. For the fourth consecutive year, Arup has been named one of Greater Toronto’s top employers! Greater Toronto’s Top Employers for 2021 are recognized for exceptional human resources programs and forward-thinking workplace policies. Find out more about what makes our Toronto office an outstanding place to work here: https://bit.ly/2B3QYL8

I am trying to make a routing decision based on the Candidate node's routerequestqueue's summation of the entities user-defined property. If there are different types of entities with ex. different priority levels. I would like the routing process to choose the transfernode which has the smallest total sum of it's entities priority level. the transfernode that needs to be chosen also has a routing group attached to its entity destination type rule where its final machine has 0 buffer and due to a blocked destination rule, there will be a queue build up at the transfernode that needs to be chosen. I have thought about using a state variable for each node and using add-on process each time a unit enters and leaves a node but because the main model has many multiple nodes the node's entity priority sum has to be able to be accessed through the candidate.transfernode._________________. For example during the routing step in the process section, I have candidate.transfernode.destinationroutinggroupname.routerequestqueue which gives me the node's number of units waiting, but i need to be able to access the candidate nodes summed queued property. Is there either a way to directly access this information, have looked at the expressions and having a hard time finding something. failed attempt: candidate.transfernode.destinationroutinggroupname.routerequestqueue.population.defaultentity.priority.summation or is there a way to use the add-on process where i am adding/subtracting the priority levels, but somehow attach it to the candidate.transfernode's property Hopefully this makes sense. If you look at the file, please ignore the upper half and focus on the transfer nodes maintransfer, transfernode1 and transfernode1_1. maintransfer has an entered add-onprocess which is the subject of this question. the route process and it's selection expression is what I'm trying to adjust but find a way to express the candidate transfernodes of transfernode1 and transfernode1_1 (which are part of the XferRouting group). I'd like to choose and compare the total summed priority level of each node's queue. Simple_Routing.spfx

About the job Position: Industrial Simulation Services, Simulation Developer Location: Kitchener, Ontario Experience: 3-5 Years of relevant work experience Division: OTTO Motors Area of Study: Industrial/ Mechanical/ Mechatronics/ Systems Engineering NOTE: Must be able to travel to the U.S at time of application. About Clearpath Robotics Inc. Clearpath Robotics Inc. develops the future of robotics technology through development and sale of industry-leading self-driving technology, products, and services to over 500 of the world’s most innovative brands. Proprietary hardware, software, and services are delivered through the company’s research and industrial divisions: Clearpath Robotics and OTTO™ Motors. Clearpath Robotics Inc. is an award-winning company with recent awards including Robotics Business Review Top 50 Robotics Company, Edison Award for Innovation, Business Insider Top 40 under 40, and Canada’s Top 100 Employers. About Clearpath Robotics Research Solutions Clearpath Robotics’ research solutions group is a global leader in unmanned vehicle robotics for research and development, and provides hardware, software, and services to enable self-driving vehicle development, deployment, and operation. Clearpath Robotics works with over 500 of the world’s most innovative brands in over 40 countries, serving markets that span mining, military, agriculture, aerospace, and academia. Visit Clearpath Robotics atwww.clearpathrobotics.com. About OTTO™ Motors OTTO™ Motors is making material handling in industrial settings safer, easier, and more efficient through development of hardware and software that automates movement of goods in busy factories and warehouses. The company’s industry-leading self driving technology provides automated and on-demand material handling in the most demanding industrial environments, spanning automotive, medical device, aerospace, logistics, and more. Customers trusting their mission-critical material handling needs to OTTO Motors include Fortune 100 brands GE, Toyota, and Caterpillar. For more information visitwww.ottomotors.com. About the Job Having 10’s of robots run around our offices is great, but having hundreds of robots running around inside our computers is even better. Rich simulation environments offer a wide range of benefits to many aspects of our business: fast research, development and validation, sharp marketing tools and strong customer experience / support. We're looking for a Simulation Developer to create and run simulations that will help us optimize our robot fleets and system solutions. As a part of the Industrial Simulation Services (ISS) team, you will act as a subject matter expert and lead modeling and simulation activities. The ISS team works closely with our Systems Engineering, Applications Engineering and Project Management team, to support overall solution design from initial concept all the way to full system design and deployment. You will be building material flow strategies (based on self-driving vehicles) for products already in our arsenal and ones that do not yet exist. Your goal is to develop accurate and robust simulations to evaluate design, lower risk, and enhance the elegance of our solutions to fuel our growth. Primary Responsibilities Creating discrete event simulations for real and hypothetical systems, estimating fleet sizes, identifying traffic bottlenecks, testing what-if scenarios to optimize performance of robot fleets Consulting with project leads, sales team members and customers to obtain understanding of the requirements and to collect the necessary inputs Advising on simulation based metrics to evaluate system risks and performance Analyzing results and making recommendations for facility and material flow design Presenting your simulation results to our team of engineers, our sales team, and to clients Validating models against real world data to maintain accuracy relative to product portfolio Growing and improving our simulation library and internal templates for functionality, accuracy, scalability and efficiency Drafting functional specifications, proposals and effort estimation Recommending product feature and improvement ideas to our Product and Engineering teams, that lead to greater system optimization in the real world Additional tasks may include: Interacting with our development team as necessary to assess impact of new feature or product Developing simulation models to assist Sales & Marketing in demonstrating Clearpath's products and capabilities Using your expertise to assist our engineering services group in developing the more complex system concepts About You You're excited about the role that robots will play in the future, and intrigued by the challenge of joining a young company in this high-growth market. You have skills and experience that you know can make a difference with the Clearpath team, whether we're looking for them or not. You are driven and view work as more than just a job. You are motivated by making an impact on your workplace and you thrive on challenging and rewarding problems. Most of all, you want to be on the right side during the coming robot revolution. The ideal candidate will have: Proven success using simulation solutions to evaluate feasibility of facility design or operational changes Experience with discrete event simulation tools like Simio, AutoMod, AnyLogic, FlexSim, Delmia, and understanding of its limitations Experience collaborating with cross-functional and external client teams to gather comprehensive data required for model development and/or analysis Fearless in questioning to ensure end users get the most value out of your work. You understand the importance of early goal alignment and scope definition Effectively communicate complex model functionality to the client or internal team for assurance of model results accuracy Customer-first mindset Avid self-learner Ability to work independently with minimal supervision and manage deadlines. Able to cope with sudden jarring changes in projects, priorities, and the local gravity field. Bonus Points for: Experience identifying traffic and material flow bottlenecks and mitigating risk Experience in manufacturing industry Understanding of different industry warehouses. You see block diagrams and flowcharts everywhere and speak the language. Experience with Object-Oriented programming Working knowledge of one or more of C#, Python, VB.NET Exposure to working with ROS, Gazebo Past participation in simulation challenges What’s in it for you: Flexible Hours, Health Benefits, Parental Leave, Vacation, Equity, Community Days (paid), Half-Day Birthdays, Passionate and Dedicated Teams Curious to know more about the culture at Clearpath & OTTO, check out: https://clearpathrobotics.com/blog/category/blog/culture/ Come join us if you feel like our values resonate with you, and if you are interested in being a part of making industrial workplaces safer and revolutionizing automation. At Clearpath, we are committed to building and supporting a culture of diversity, inclusion, and accessibility. We hire the best talent regardless of race, color, creed, national origin, ancestry, disability, marital status, age, veteran status, six, sixual orientation, gender identity, and expression. If you require special accommodation to complete any portion of the application or interview process, please contact 1-800-301-3863.

Senior Industrial Engineer - Simulation Req #: 67308BR York, Pennsylvania, United States Engineering & Technology Platforms & Services Posted on:03/29/2021 Job Summary Career Level Experienced Travel Percentage 10% Full-Time / Part-Time Full-Time Clearance Level - Must Currently Possess None Shift 1st Shift Relocation Available Yes ITAR: U.S Citizen or Green Card Required Yes Clearance Level - Must Be Able to Obtain None Job Description What motivates you? If the answer is a position where you can develop your skills and earn opportunities for advancement while being part of a forward looking team then this is what awaits you in a career at BAE Systems. Our employees work on the world’s most advanced combat vehicle systems. From the M109A7 Mobile Howitzer with its long range firepower to the Amphibious Combat Vehicle that transports America’s Marines from ship to shore, we are developing the technology of tomorrow while delivering the most cutting-edge equipment available today. Our flexible work environment provides every opportunity to positively impact the company without giving up your personal life and we welcome all those who understand the importance of improving production velocity, having big ideas, and craving innovation. We draw strength from our diversity and always put our customers first through an unwavering commitment to bring the warfighter home safe. Does this sound like a team you want to be a part of? If so, come build your career with BAE Systems. The Combat Vehicles line of business within the Platforms & Services (P&S) Sector of BAE Systems is looking for a self-motivated Senior Industrial Engineer to support the production scheduling of armored military vehicles. Working as a team member of a larger Industrial Engineering Group, this Engineer will be required to build and maintain simulations for varied fabrication, assembly, and testing processes. The candidate must also be comfortable with soliciting input through face to face interaction and, in general, must demonstrate that they possess strong analytical, problem-solving, and interpersonal skills that will support individual and team growth. A strong background in discrete event simulation, specifically with the use of SIMIO, is necessary. Specific responsibilities include: Day-to-Day · Complete simulation support activities such as time studies, production line balancing and production metric development · Evaluate complex Technical Data Packages (Drawings, Bills of Material) and be able to understand how a component or vehicle is assembled · Utilize a strong understanding of integration activities like implementation of standard work, material kitting, metric tracking, and process improvement to advance manufacturing methods. · Work on the manufacturing floor with other Engineering disciplines, production supervisors, and employees that directly interact with the components or vehicles being produced. Internal and External Customer Relationships · Engage in regular communications with production support, planning, logistics, quality, manufacturing supervisors, and direct labor workforce to assess operations performance. · Summarize and present findings to internal customers to gain buy-in for improvement efforts · Discuss the status of metrics and key performance indicators with appropriate decision makers Development · Work with Industrial Engineering leadership to understand the expectations of new Engineer within the organization and company · Share responsibility of self-development with immediate supervisor · Maintain a safe work environment and ensure compliance with safety objectives and policies. Required Education, Experience, & Skills - 4+ years of simulation experience within SIMIO - BS degree from an accredited university Preferred Education, Experience, & Skills Demonstrated capability with the use and application of SIMIO discrete event simulation software. About BAE Systems Platforms & Services BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. Improving the future and protecting lives is an ambitious mission, but it’s what we do at BAE Systems. Working here means using your passion and ingenuity where it counts – defending national security with breakthrough technology, superior products, and intelligence solutions. As you develop the latest technology and defend national security, you will continually hone your skills on a team—making a big impact on a global scale. At BAE Systems, you’ll find a rewarding career that truly makes a difference. The Platforms & Services (P&S) sector under BAE Systems, Inc does the big stuff: the armored combat vehicles, naval guns, missile launchers, and naval ship repair…just to name a few. Our employees take pride in the work they do and why they do it. They are on the front lines every day, building our products to protect the lives of those who serve. We may be biased, but we think P&S does some of the coolest work around, and we think you will too. At BAE Systems, we celebrate the array of skills, experiences, and perspectives our employees bring to the table. For us, differences are a source of strength. We’re laser-focused on high performance, and we work hard every day to nurture an inclusive culture where all employees can innovate and thrive. Here, you will not only build your career, but you will also enjoy work-life balance, uncover new experiences, and collaborate with passionate colleagues. https://jobs.baesystems.com/global/en/job/67308BR/Senior-Industrial-Engineer-Simulation Thanks, Jenny Ridings, PHR Principal Talent Acquisition Specialist BAE Systems My pronouns are she / her M: +1 904 570 2489 | E: jenny.ridings@baesystems.com https://jobs.baesystems.com Connect with BAE Systems: Join our talent community!

[EDIT] Hi all, I am modeling a restaurant, where orders are placed until 22:00. The preparation of these orders takes approximately 20 minutes (it can be more or less due to the probability distributions involved). I have some workers whose schedules are from 10:00 to 22:30 and they prepare these orders. The problem is the following. Suppose that it's 22:30 and there are still some orders in the queue. Since the worker's schedule ends now, those orders can't be processed and will remain for the next day. This obviously does not happen in a real-life restaurant. So if at the end of the worker schedule (22:30) there are some orders in queue, I would like to extend the schedule until all orders are met. The problem is I don't know how long it will take the workers to prepare the missing orders, so I can't suppose a certain time needed to complete the orders. I have to wait that the last order is prepared to set the end of the working day. How can this be done? Thank you in advance, Marcel Favereau

Hi all, I am modeling a restaurant, where orders are placed until 22:00. The preparation of these orders takes approximately 20 minutes (it can be more or less due to the probability distributions involved). I have some workers whose schedules are from 10:00 to 22:30 and they prepare these orders. The problem is the following. Suppose that it's 22:30 and there are still some orders in the queue. Since the worker's schedule ends now, those orders can't be processed and will remain for the next day. This obviously does not happen in a real-life restaurant. So if at the end of the worker schedule (22:30) there are some orders in queue, I would like to extend the schedule until all orders are met. How can this be done? Thank you in advance, Marcel Favereau

Hi Ryan, Thank you for the corrections. As always, spot-on advice, that is very appreciated. I do have a few follow up questions. - Do I set the Initial Sequence property to 'Sequence1' or do I need to tell it the row too? 'Sequence1.Sequence'? Sequence 1 is working, but just wondering. - In the SimBit, Entity Follows Sequence With Relational Tables, there are three types of Entities that all flow through the same source with the Source Property, Table Row Referencing, pulling from the JobTable with the Row Number 'JobTable.ProductMix.RandomRow.' For my model, I have two different entities and the source Bldg is supposed to pull BOTH entities with the Table Row Referencing, "JobsTable" with Row Number: "JobsTable.NumberWorkers.RandomRow." But when the model is run, only one entity is ever used. The Table has an ExpressionProperty of Random.Triangular(3,6,9). Is that the problem? The SimBit's table was an actual number. I tried replacing the Expressions with actual numbers and the Entity switched to use the other one but I am still not able to get half the 34 to be one Entity and the other half to be the other Entity. - How do I get the Vehicle to carry its max capacity? The capacity is set to 6, and it only carries up to 4 entities around at any time. This is incorrect, as the Entities are supposed to be grouped into work teams of Random.Triangular(3,6,9) for their initial Source output move. Afterwards they can be individuals or work teams. The Bldg has the Entity Type defined as the JobsTable.Specialty so it should pull from one or the other (like the below mentioned SimBit), and the with Entities Per Arrival Set at 35; and the Entities themselves are set to a population maximum of 17 each and I get a Runtime error of maximum number exceeds limit for the entities. Why doesn't it hit the limit and then pull from the other Entity? - I'm confused about the network you mentioned above. I thought the nodes had to be linked directly (output to input node). So the busy nodes have a lot of paths radiating out from them and it makes it a little messy. Is there a cleaner way to show the routing? Thank you,

Hi all, I have a model with several servers, each with their own Changeover Matrix for cleaning between jobs. This is done by a Sequence Dependent Setup within the Servers Task Sequence steps. This is working fine when the Cleaning is either done 100% Automatic or 100% Manual with a Worker called as a Secondary resource. Some servers however require partial support from a Worker. For example a COMatrix of X mins needs to include 5 mins support from a Worker at the start and 10 mins support from a worker at the end of the Changeover period, with the middle X - 15 mins in the middle of the CO cleaning period (There are other more complex examples too where the operator will be required half way through the process too to empty the cleaning waste container). Is there a way of saving the COMatrix time, rather than running this delay, so that I can then build an add on process or add further task sequences to break the time into its Automated and Manual Components? Thanks in advance for any suggestions. J

Hi GFurtado! Thanks for your answer! I'm using Simio 11.189 as my testing ground, and even though the ribbon is not the same, I can import data trough it, the problem is, even tho the data is imported into the table, it is not updated mid run so Simio keeps using the values previous to the new import, I'll elaborate a bit. Imagine these are the original values in the binded table I created. With those original values, I start the simulation and after a while I update the binded file (the .csv where Simio is taking values from) and I click on update table with the following options enabled. (Bear in mind! I've tried all of the options in the image below to no avail!) (Options used before clicking update mid-run) (Updated mid-run table, values get updated but Simio doesn't use them!) While the values get updated, Simio doesn't use them in this run (in the example I posted, it would only use the original first 9 values instead of all of the 19 values provided). As further context, I am indeed trying to make kind of a 'wacky' simulation, my idea is to update the .csv providing the data to the table at periodic intervals with new data from a real life reading from a machine, or something similar, and use that data as the entity creation time to try and make kind of a 'parallel' simulation with the actual readings of the system. But of course, for me being able to do that I need to know if Simio can update tables with new data and USE that new data mid - run! Thank you so much for your reply and for your time! Have a great one!

Yes, you can certainly model this in Simio, and can easily make it terminating. I would suggest reviewing any simulation textbook for verification and validation techniques. The general answer for number of replications is to run for a few (5-10?) replications and look at the half-width on your key output measures. If the HW is too wide, then run additional replications until all your key measures are at the precision you need.

Hi All, It's been a while since I have last used Simio and I have an issue that I think should be simple. I have two entities running on a production line, one gets processed by a server and the second entity type moves through the same server almost like a conveyor with no processing. I can work around this by adding another conveyor around the server, but in real life the product does flow through this server and eats at it's capacity. Is there anyway to set up different processing times for multiple entity types on a server? Thanks, Brendan

Yes, I saw the simbits, it wasn't helpful. I have 2 excel worksheet, one list 100 parts, another showing utilization of 50 vechicles for the next 120 months (life span of the vehicle). Each vehicle will have those 100 parts that requires some type of maintenance. Every so often maintenance must be performed based upon the frequency of those parts. How do you traverse the vechicle page both vertially hand horizontally. Plus I need to count up how many parts will be required (with cost) for given year and life span of the vehicle. If i can't get Simio to work, I'll write code. Attached is an example of the data file. Parts vs 1.xlsx

Yes, I saw the simbits, it wasn't helpful. I have 2 excel worksheet, one list 100 parts, another showing utilization of 50 vechicles for the next 120 months (life span of the vehicle). Each vehicle will have those 100 parts that requires some type of maintenance. Every so often maintenance must be performed based upon the frequency of those parts. How do you traverse the vechicle page both vertially hand horizontally. Plus I need to count up how many parts will be required (with cost) for given year and life span of the vehicle.

My main difficulty at the moment is the batching logic. How to simplify it to use the matching expressions instead of an add-on process. In real-life, the worker needs to decide which filling station to batch for - each one puts a different material in the containers. the worker stays at the filling station until the containers in the batch are full. which family of skus to create a batch for, based on pressure and volume which individual skus and how many of each to put in the batch. currently there are upwards of 30 different skus that can go in a batch. a batch is around 40 members. all the members can be from the same sku or it can be all mixed up (so long as volume and pressure of all members of the batch are the same). which skus and how many of each depends on full inventory for the sku, forecasted demand for each sku, and service level goals that can differ by sku class. This is pretty much a production scheduling problem. I'm not saying it can't be done with matching expressions, I just don't (yet) see how it could be done with single expressions. Really, though, that's ok. I have a way to do this now, even with add-on processes. it may not be most efficient, but a few days ago, nothing was working. I can't tell you how much I appreciate your help.

Hi, so just to clarify, this means that a separator would not be able to split the entities half-half, and that there needs to be an additional step after the separator to split the entities? Thank you!

Hi, I currently have a model as follows. I have a separator, and I want to divide entities that enter through it evenly across the 2 nodes. So half of the entities go out from the parent node and half go out of the member node. Currently right now, I did not manage to do it for the separator, even when I tried all possible methods in SIMIO for splitting the batch itself. How may I go about the problem? Thank you!

Thanks Gocken, I appreciate the answer, I have seen the model you proposed, My problem is specific to my objective and replacing worker object isn't an option unfortunately. Increasing their capacity will deviate from the real scenario I am trying to model so , won't be able to pull that off either. I will however, try to play around with the dwell time as you suggested . I want to imitate a real life scenario where the path you see in the model is a gravity roller conveyor that isn't motorized. As a result the workers (worker3 and worker4) which are further down the line in my model don't always need to come to the very Output of Server1(Shooter) after placing a package onto a cart. But can instead be able to collect packages from near their vicinity and place them accordingly to respective carts

I've got multiple workers going to single server. As the title implies, I'd like these workers to mimic the real-life behaviour of randomly going on leave for a random amount of time. Ideally I'm looking for something that's shown in vehicles or servers, but for workers. Does anyone here know an easy workaround for this? I did think about adding in a add-on process after the worker releases an entity with a counter, and after a certain count the worker is seized for a random amount of time. I just thought there would be a better way. Another alternative would be creating a work schedule for each worker, but there's over 60, so that might take a while.

I'm new to Simio. I'm trying to split my original entity into two different parts. The goal is to have the entity be separated, with half of them having a different server processing times through the same server.

Hello all and thanks for letting me be a part of Simio Insiders I am closing in on having done my first source, server, sink simulation. It is done as a part of a University study and is due next week. Feel free to download my attempt and have a look at it. The process I want to simulate is as follows: 1. Chef recieves an order of 1-6 beef patties 2. The chef puts the patties in a grill, that has capacity of 12 patties, and a base cooking time/process time of 1 minute total (that increases with order size) 2a. If more orders come in, while the grill is preparing an existing order, they have to be put in queue, as the grill should not be interrupted. When the grill/server is free again, it will take all - or up to 12 - from the queue, depending on how many orders are in queue 3. The patties go to the sink I am using a Time Varying Arrival Rate table from real life data, on the course of 2.5 hours. The trouble I am having is as follows, and please, feel free to only answer some of them, if you don't have answers for all: _____________________________ a) Order size We want to have orders vary from 1 to 6 patties, per order, in a way that resembles this distribution: 1 (min order size) patty ; was ordered 2 times 2 patties ; was ordered 18 times 3 patties ; 9 ... 4 ; 7 5 ; 3 6 (max order size) ; 1 I have not been able to imitate this behavior. Right now, I use Entities per Arrival to be Random.Possion(2), as this looks a bit like this distribution above, but the flaw with Poisson is (I believe), is that an order-size of 0 patties is a possibility, which doesn't make sense. I have also been playing around with a lookup table, without a real clue on if that's the right thing to do. What should I do to resemble this? _____________________________ b) Server (grill) behavior The problem right now is, that the grill (server) can keep taking in patties, even if it's already processing. That doesn't make sense, if you think about it, since you can't put patties into a closed grill. I want it to start preparing an order, as soon as it gets it, and just let the queue of patties build up until the grill is free again. Then, take up to 12 patties into the grill. _____________________________ c) Process times For the grill, I want the process times to follow the amount of patties in the grill. The grill takes 60 seconds to prepare a patty, and we assume each patty takes 2 seconds to load. Therefore, we choose to simplify that: 1 patty takes 62 seconds to make 2 patties take 64 seconds 3 ; 66 sec 4 ; 68 sec 5 ; 70 sec 6 ; 72 sec 7 ; 74 sec 8 ; 76 sec 9 ; 78 sec 10 ; 80 sec 11 ; 82 sec 12 (max grill capacity) patties ; 84 sec Which is basically y = 2x + 60 In the simulation I uploaded, each patty, no matter the order size, just takes 60 seconds, which is incorrect. How do I get the grill to behave like this? _____________________________ d) Batching After getting the server behavior to work, I want to work with the utilization of the grill. My idea is, that if the server (grill) is told NOT to start preparing patties right at the moment, it receives the order, e.g. if the quantity is small, but instead waits a certain amount of seconds, to see if more orders should come in, maybe the total wait can become less. There shouldn't grow any large queues with the current arrival rates, but if we double it, it might become relevant, so customers shouldn't wait for too long. Another option would be, that it waits till a certain amount of patties are in queue, such as a minimum of 6. _____________________________ Thanks again, and I sure hope you will take a look at this! You are more than welcome to edit the file, but it is also fine, if you just type in here. Best regards, Johan Grill.spfx

Hi Glen, is there a way to speed up the import of the objects and links ? I import now ca 350 objects, 350 links, some vertices. Half of the list are new objects for the model and the other half are the nodes of these objects which are repositioned that way. Especially repositioning these nodes takes a long time. This takes 15Minutes already. It seems like the time increase is exponential to the number of lines in the list, not linear. Thanks for any hint how to make it faster Michal

Dear Judy, First of all thanks for your reply. Secondly, I attached to you another version of the model after I made some modifications. It can be seen in the model, I named a new server as Section 1 and added into it two tasks (Unloading and Leveling, they were servers in previous model) each has its resource (vehicle). I used only one entity for the two tasks. Section 1 will have total Quantity by 2031.25m3 (Which means the total amount of material, since a truck will unload this material and a grader will level it on the surface). The total length of this server (Section 1) is 200 meters as in real life. For the first resource "Aggregate Tipper Truck", its total number is NumAggTr = 20, its rate per hour is named as QSTTRate (has random value), its total number of trips to finish works is TTS = 113 and quantity in each trip is named as QSTT (has also random value). While for the other resource "Grader", its total number is NumGr = 2, its rate per hour is named as QSTGRate (has random value), its total number of trips to finish works is GTS = 32 and quantity in each trip is named as QSTG (has also random value). Since the previous expressions will increase with acceleration, so I inserted Level With Acceleration for each of them to be used as state variable into Finish (Sink). Finally, PPCQSTT and PPCQSTG are the productivity of each task. I have 5 inquiries and they are: 1- Why the resources did not make the appropriate distance travelling? For example, the number of "Aggregate Tipper Truck" is 20 and total number of trips are 113 so each should make about 6 trips (113/20), since the length of Section 1 is 200 meters, then each should make 1200 meters (200*6). 2- In table which named "Sub-Activity Schedule", if I change the value under "Scheduled Finish Date" column the value under Actual Finish Date will change. Why this occurred and why "Status" never be "Ahead" or "On Time"? 3- How can I calculate the values of PPCQSTT and PPCQSTG Daily or Weekly? 4- If I want to identify constraints into each task, how can I do that? 5- How can I apply the concept of Look-Ahead Planning (Daily or Weekly), to remove the added constraints? Thank you again Best regards, Ahmed Elkherbawy Model 1.spfx

If you want a solution to a problem, it is best to post your questions inside Simio Insiders where we can post files with the response. I tried what I think you are doing and it worked fine for me, aside from the fact that the expression you used creates 1 arrival per event between 6-11am, 2 arrivals any time after that (because 10:59:59 has an hour that is still <= 10). I used your expression in the Entities Per Arrival property, created entities hourly on the half hour, and it produced 1 entity at a time until 11:30, when it produced 2.

Hello, Right now I have 2 complex models that I want to join together, they both use the same entities. Both models use a sequence for the entities to pass through it. My challenge is combining the models using a sub-model, and I would like my entities to source from the 1st model, follow the sequence of the 1st model, enter the sub model, then follow the sequence of the sub-model. However I've tried everything I can think of and I cannot for the life of me figure this one out. Any help is appreciated.

The "brute force" way is to set up 32 controls (16 half hour sessions x 2 positions) and let OptQuest vary those controls to seek optimum. To do this you would manually create 32 properties and then manually type those property names into the value field for each half hour of a day pattern. A more elegant, but time consuming, way might be to come up with some strategies for varying the workers (e.g. you probably would not vary from 1 to 5, then back to 1, in 3 consecutive periods) and them optimize which strategy is best.