When collecting test time data on the UltraFLEXplus, users may immediately think of using Execution Profile feature in IG-XL. However, depending on which column of time data you observe and how the tests are programmed, the data could possibly be misleading. This is due to the PACE asynchronous architecture of the UltraFLEXplus tester. In some cases, the VBT time of one test may be artificially inflated due to a command in a previous test. In this paper, the author detail a use case where this misalignment occurs in the Execution Profile and explain why this happens.

This paper will also discuss how this can be avoided by viewing the data in Timelines. The author will briefly discuss the benefits of using Timelines to view test time data on the UltraFLEXplus tester. Benefits include the graphical representation of test time in a horizontal view, highlighting efficient pipeline usage, identifying gaps and potential test time savings and comparing two sets of data easily. All of these features, and the aforementioned misalignment of actual time on the Execution Profile, are reasons why users should strongly consider using Timelines to view UltraFLEXplus test time data.