Modules execcution times in test stand

Hello Everyone:
Maybe some can help me.
I wrote a test sequence using Test Stand program with LabView and using Field Point for hardware. There is one issue that has been notice on the test results and that is the execution time of each of the modules.
This question has been ask is Why does the execution time of the modules varies from one test to the next.
We also notice that if we run a same unit several times we do not get the same results, they are very close but never the same and that includes the module execution times.

Hello Toro,
That is a great question. Depending on what controller and modules you have, the execution times of the modules vary from one to another. There is an excellent tutorial that explains this really well, below you will find a link to it:
http://zone.ni.com/devzone/conceptd.nsf/webmain/a14d3c3314a0e24a86256dbe00664943?OpenDocument
If you don't have a real time module, then by switching to one, you are going to see a significant change in the accuracy of the times displayed. Please let me know if you have any further questions.
LA

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Mr. Zaatari,
As you will note, there are six questions posted above. As you also know, I have been waiting for your response for 5 days and decided to use this alternate method in hope of getting my questions answered. As you further know you have not answered these questions. It is a shame that you will not post your "answers" here so that the rest of this wonderful NI community might have the benefit of your knowledge as well.
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