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I need to build a simulation of a train maintenance workshop. Each of the trains are entering and exiting the workshop with always the same daily schedule (day-hour-minute). I have set up two arrival tables (one for train arrival, the other for train departure) which trigger two timers, and it works well. My current problem is that the simulation should now run over 1 year (simulation time). The arrival table is expecting a time AND a date, and I am looking for a smart solution to avoid writing repeatedly the same schedule for the 365 days of the year in an Exel file. Thanks for your suggestions

Hi Dave, Thank you for your quick response. Sorry for reply late. Let me simplified my question. Imagine in a taxi company, there are 100 taxi cars and 100 taxi drivers, each driver own his specific car, i.e. any driver can only use the car assigned to him and he cannot use the taxi car which belong to other drivers. The drivers will start their daily work at any time point from 6 am to 9 am, and that may be uniformly. After 8 or 9 hours working, the driver will drive his car back to the parking yard of the taxi company. What I want is to realize the situation that specific driver seize his specific car and then to release the taxi after 8 or 9 hours delay in Simio environment. In other words, driver 1 seize car 1 and release car 1, driver 2 seize car 2 and release car 2, and so on. Can I use a list or a table to arrange the drivers and cars? And I also want to watch the animation of car busy or idle by using resource object, and even consider the failure and repair conditions of cars. Clark

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

Hello Everyone, I would like to use patient daily arrivals to the ED. I have daily totals, but I want them to follow a pattern (eg. at midnight the arrival is much less than during noon). I am trying to include future forecasts (my forecasts are daily forecasts and not hourly) and this is why I need to somehow input daily numbers into rate table but also make it follow the pattern. Would really appreciate help with this! Thank You! Best regards, Sumanth

Hello Thank You for your help, i was able to implement it!! I have a slight snag though, in the rate tables it only allows me to enter arrival events per hour. I have daily sum of arrivals (say x). If i assume mean arrivals per hour are the same and use the typical sum(x)/24, the model underestimates the total arrivals per day. I understand that simio uses exponential distribution to randomly genrate a number. Do you have any suggestion for me to retrieve arrivals per hour from daily arrivals to input into simio? Thank You!

Hello Martin, Thank you so much for your help! It worked Brilliantly. I have another question, I want to incorporate patient daily arrivals to the ED. I have daily totals, but I want them to follow a pattern (eg. at midnight the arrival is much less than during noon). I am trying to include future forecasts (my forecasts are daily forecasts and not hourly) and this is why I need to somehow input daily numbers into rate table but also make it follow the pattern. Would really appreciate help with this! Thank You! Best regards, Sumanth

Sumanth - You have quite a few different ways to go about collecting these interval based statistics, the first few that come to mind include: (With Enterprise Edition) setup a daily timer and trigger a process to write the statistic to a output table, then reset the statistic Setup a tally statistic and a daily timer and trigger a process to tally the statistic, then reset the original statistic Setup a array and a daily timer and trigger a process to capture the statistic in the array, then reset the original statistic As you can see, in all cases have some statistic that can be cleared on the interval after capturing its data in either a output table, tally statistic or array. Let us know if we can be of any help with your healthcare model -- we've done quite a few of these with various levels of detail depending on the question at hand. Sincerely, Martin

Ok. I've been looking for replies almost daily, working on a different side... Now, coming back.. Hopefully an easier question. How can I reset the FlowSource after it has generated a predefined volume of an entity? So, I have a table with sequence of volumes. I need to follow this table and generate sequentially the indicated volumes. Let's say that entity is the same for a start (which is actually wrong and the next step will be selecting the entity simultaneously). Simulation should stop only after all the volumes have been generated. UPD: To make it even simpler. Can I just reset the FlowSource so that after it has generated everything is has (MaximumVolume), it resets the generated volume to zero and proceeds again with this amount?.. For, say, two or three times.