OptQuest permutation problem

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Dawid Dabal asked May 29, '17 Jordan Johnson answered May 31, '17

OptQuest permutation problem

permutation.fsmI have a problem with permutation using OptQuest - I suspect that Lower/Upper bounds don't work properly.

In this sample model I want to find permutation:

Each variable is a cell in GlobalTable1. My PFM is GlobalTable1.cell(1,1).value and I want to minimize this value (my PFM is the same as Variable 1).

Solutions generated by OptQuest are between 1 and 7 - but they should be between 2 and 8 (lower bound = 2, upper bound = 8)

Is this a bug?

Software Version:

FlexSim 17.1.2

optquest permutation

7ks8d.png (5.3 KiB)

hs7ov.png (13.0 KiB)

permutation.fsm (63.0 KiB)

· 1

Sam Stubbs ♦ commented · May 30, 2017 at 02:21 PM

@jordan.johnson

Are you familiar with this issue?

0 ·

Answer 1 · 2017-05-31T15:37:26Z

Jordan Johnson answered May 31, '17

The lower and upper bounds for permutation variables are ignored by the Optimizer. As a workaround, you will need to write code that shifts the value in the table by 1:

var myValue = Table("GlobalTable1")[1][1] + 1;

This behavior is why the UI sets those values to N/A (or not applicable) when you change the variable type to permutation.

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