process time using global table

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yoni A asked Apr 12, '18 Jordan Johnson commented Apr 13, '18

process time using global table

I have a sample of 100 cycle times to load into a processor, I created a global table where I added the cycle times, how should I set -up the processor so it can read form this table,

2- will the processor pick a value at randon from the global table?

Software Version:

FlexSim 18.1.0

processor

Answer 1 · 2018-04-12T20:22:58Z

Jordan Johnson answered Apr 12, '18 Jordan Johnson commented Apr 13, '18

If you have a table of cycle times like this:

Then you can set the cycle time to a random value from this table like this:

Table("CycleTimes")[duniform(1, Table("CycleTimes").numRows)][1]

This code gets a random row from the table. Then, it uses that row to get a value from the same table.

randomcycletimefromtable.fsm

tableofcycletimes.png (4.8 KiB)

randomcycletimefromtable.fsm (18.3 KiB)

· 2

yoni A commented · Apr 13, 2018 at 12:38 AM

@jordan.johnson , thanks jordan, can I also use the same logic described to add MTTR (Equipment downtime); for the equipment to be down randomly from a table of downtime values, how can I make the uptime field and first failure time to be ignored, if the only data that I have is downtime values, will this logic work better tan just Duniform distribution

thanks

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Jordan Johnson ♦♦ yoni A commented · Apr 13, 2018 at 04:43 PM

All the fields in the MTBF/MTBR specify durations. To use this tool, you will need to know how long the machine goes between breakdowns (the Up Time field; often, this is the same as the First Failure Time field), and how long it takes to get it back up. You can use a distribution, or the technique I showed above, to have the up-time and down-time be randomly longer or shorter.

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