CTA Process Models & Execution Flashcards
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Read the first 6 CTA Process Models & Execution flashcards as text
Which NI-supplied TestStand process model is most appropriate for a single-operator, single-UUT manufacturing station?
Answer: Sequential
The Sequential process model processes one UUT at a time under a single operator, making it ideal for simple single-station manufacturing.
In the TestStand Batch process model, what distinguishes a 'Master' thread from a 'Test Socket' thread?
Answer: The Master thread coordinates batch flow while Test Socket threads run per-UUT tests
In the Batch model, the Master thread handles synchronization and batch-level logic while each Test Socket thread independently tests one UUT.
What TestStand mechanism allows a process model to pause all test sockets until every socket reaches a synchronization point?
Answer: Rendezvous
A Rendezvous object blocks each participating thread until all threads have reached the same point, then releases them simultaneously.
Which callback in the TestStand process model is executed once before any UUT is tested, making it ideal for fixture initialization?
Answer: PreBatch
The PreBatch callback runs one time before the batch begins, providing the correct hook for station-level fixture initialization.
A CTA architect wants the process model to prompt the operator to reseat a UUT upon failure and allow a retest. Which feature enables this?
Answer: Limit Test retry count property
The Limit Test step's built-in retry count property allows TestStand to automatically prompt the operator and repeat the measurement a configurable number of times.
In the TestStand Parallel process model, how is the number of concurrently running test sockets typically controlled?
Answer: Through the 'Number of Test Sockets' setting in the process model sequence
The Parallel process model exposes a configurable 'Number of Test Sockets' parameter that the architect sets to match the physical fixture count.