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About GFleurquin



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  1. Actually both expressions for the mean are right because gamma(1+z)=z*gamma(z). Simio uses the classical parameters, shape and scale. The different parameters you use leads to a mean around 83, but the two distributions are really different. You can have a look at http://reliawiki.org/index.php/The_Weibull_Distribution, especially the reliability plot, to see how different the behaviour can be when shape is >, =, < 1. And yes, with shape<1, the variance is higher.
  2. I am not sure I understand "released separately". Your 3 entities are processed and then released separately, this is the classic behaviour in a server. But if your server has a capacity =3 and the entities entered it at the same time, they should be released separately but at the same time. If not, there might be a problem in either your capacity, processing time or the "wait" logic...
  3. An "on entered" process which makes entities wait until there are 3 in the queue + a server of capacity 3 could make what you want, I think.
  4. I fear you cannot. Depending on what you want to do, either switch to servers and add processes, or work with your workstation by using batches for instance.
  5. I think you will find an answer in this post: http://www.simio.com/forums/viewtopic.php?f=17&t=737&p=1848#p1848 The gate could be an answer to your problem. Regards.
  6. Thanks for the advice. Actually these events are really simultaneous (I simulate the grouped maintenance of multiple machines), and I have initially let Simio schedule them. I just wanted to understand the logic. But I have not yet used math.epsilon, and maybe I could add some "intelligence" to my models using that. Thank you again!
  7. Hello. In my model, I have three timers that launch events at the same time: based on time, one (call it A) launch its event at 60, the second at 30 (B) and last at 120 ©. So every 120hours, the three launch their events. Does Simio choose randomly their order on the heap, or is there some kind of "hidden choice"? In "Simio event calendar", it is written that "Within an event type the events are ordered by event index; i.e. the order in which they were scheduled". I do not really understand "the schedule order". In my model, it seems that Simio chooses C-A-B for what I have seen. Is anyone able to explain? I thought that maybe, at time 0, C is put in "future events", so are B at 30 and A at 60. Then, at 60, A is added at 120 (after C so) and B at 90. Finally, B at 120 and we have the order C-A-B. Am I right? Thank you!
  8. Hi all. I have not found if we can force a server to shift "off shift" with processes. Actually, depending on some events or on some other processes, I would want to "pause" some servers, even if they could continue to process. For instance, if a server, resource or whatever fails somewhere in the model, I want to shift some of the other server/workstations "off shift" (or "idle", but there is not this state for servers). I suppose so that it is not possible to impose a change of state of servers, workstations etc., but if I am wrong, how could I do? Thank you! Guillaume.
  9. Hello, The model that I want to do is to treat N entities at a time. I am looking for a simple solution because: - The workstation allows a batch operation but an entering entity is considered as X elements. - Servers can have a capacity higher than 1 but the process is begun as soon as one entity enters the server (and so it is not N entities at the same time). The solutions I can see are: - Making a virtual batch parent for my N entities before entering my server or workstation (visually heavy, harder to extract useful indicators, but it is working!). - Making a process that allows entities to be processed in a server with capacity "N" only when N entities are in its input buffer. Until now, as I am new to Simio, I have not been able to implement this solution as I could not well link the size of the queue of the input buffer with the processing action of the server/workstation. But it seems a good alternative. Are there other simpler solutions that I have not seen (an option of servers or workstations, a simple process...)? Thanks (I hope I have been clear enough!) G. Fleurquin
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