topic HC Changing random number stream obtains the same set of numbers in FlexSim Forum

HC Changing random number stream obtains the same set of numbers

jolene_c — Wed, 27 Jun 2018 18:15:43 GMT

[ FlexSim HC 5.3.0 ]

I'm using the free version and I understand that the experiment function is locked. However, I believe I should be able to manually change the random number stream in the distribution chooser and obtain different sets of process times for a specified distribution. But it seems that even though I edit the number stream (any number between 0 and 100), there is no change in the process times. Is this also a limitation of the free trial version? Is there any way for me to generate different sets of numbers from the distribution? Thank you.

Re: HC Changing random number stream obtains the same set of numbers

philboboADSK — Wed, 27 Jun 2018 18:23:21 GMT

The random number generator is purposefully fixed with the free version.

If you want statistically valid results, you need to have a license.

Contact your local distributor to purchase a license or request a timed license for evaluation purposes.

Re: HC Changing random number stream obtains the same set of numbers

jolene_c — Thu, 28 Jun 2018 07:14:19 GMT

Thanks for the reply. Since the random number stream in the distribution chooser wasn't blanked out (i.e. I can edit it), I thought it would be possible to obtain statistically valid results by manually changing it before each run.

I have kind of found a way around it by using a separate software to generate different sets of number. Then, I use global table lookup instead of distribution chooser to obtain process times. This definitely requires a lot more effort though.

Re: HC Changing random number stream obtains the same set of numbers

SCHamoen — Thu, 28 Jun 2018 10:04:08 GMT

@Jolene C

This definitely requires a lot more effort though

Yes, that is why you should buy a license 😉