How do I define not program breakdowns in Flexsim?

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Elisa Vernaza asked Dec 5, '16 Joerg Vogel edited Dec 5, '16

How do I define not program breakdowns in Flexsim?

For example, in a company there are at least this breakdowns: minimum 1/day, maximum 3/day, and the most common is 2 per day. Each stop lasts 5 minutes. I was trying to do it with MTBF / MTTR, but in First Failure Time I can only enter distributions of the times of the breakdowns, however I only have the information I previously specified. Does anyone recommend me how to do this?

Software Version:

FlexSim 7.7.4

breakdown

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5 |100000

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Joerg Vogel commented · Dec 05, 2016 at 04:14 AM

first failure time is a function from the real behavior of a machine. You buy a electric tool. You expect that this product is functioning well at last several years without any errors. Then there is happening the first error maybe in the 4th year right after the manufacturer guarantee has been expired. Now your experience will tell you the next error will come earlier then the previous one. And it's going on this way with all the following errors until you decide to buy a new tool. If you want to build such a scenario you have to distinguish between the first failure time and the following failures. In your model there isn't any difference between the first failure time and mean time before failure. You set the distribution parameters to be the same.

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Answer 1 · 2016-12-05T03:59:41Z

Joerg Vogel answered Dec 5, '16 Joerg Vogel edited Dec 5, '16

Then you choose a distribution. Test its parameter in a small model to fit your criteria. Your test should last at a minimum period of 100 days. And if nothing else works you create a global table based on a discrete empirical distribution with your three probabilities. The command is "dempirical(obj table, num stream)". You find the documents in the command manual under the function keywords dempirical and empirical.

5 |100000

Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

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