Lambda Search – 1)An ordered approach used when diagnostic tests are not able to isolate the failure to a single item and systematic removal and replacement begins with the highest failure rate item (based on reliability or historical data) in the group. Troubleshooting proceeds until the failure item has been replaced. 2) A method for prioritizing the replacement of repair items in an isolated ambiguity group, based on isolated failure probability. Testability analyses often include both fault isolation metrics (based on testing only, without the use of lambda search) and fault resolution metrics (which take into consideration both testing and serial replacement prioritized using a technique like lambda search).
