When a Unit fails a test and logs the UUT report, this will tell you the symptom of the failure (e.g. failed in the 5-volt internal measurement). The next step of the investigation is the repair or rework operation. With the Repair functionality operators can launch a web-based reporting tool that allows them to scan the unit’s serial number, and WATS will automatically retrieve the failed UUT report and display the failed test(s). Further, the operator can enter (from a pre-defined code list) the type of Failure/repair/rework on the unit (e.g. Solder balls), reference to a component, comment and attach an image of the failure (e.g. a picture of a broken connector). By combining test results with repair data, WATS can provide advanced analysis and traceability.

This will help determine the Root Cause of the failure a lot faster and enables quality improvements on products due to better DfT (Design for Test), DfM (Design for Manufacturing) or selection of component and processes.

Further, the Repair module comes with a set of reports and analysis to help analyze the data in “real-time”; like repair time (average time from when a Unit FAILS in a test process, being repaired and tested PASSED again in the same process), Repair analysis (pareto diagrams, failure type analysis, component analysis, failed test step report, station/operator report) and components for “stand-alone” dashboard reporting.


Test step Yield and Analysis