The process elements to successfully implement and perform HALT and HASS/HASA are defined in this document. The following identifies technical responsibilities, equipment requirements, testing practice competencies, and statistical quality control methods that will optimise the total process. Adherence to this document will provide management and test personnel with a common process that represents a collection of "best practices". Procedures are explained in detail; however, the basic nature of the HALT process is one of discovery that requires flexibility of process as it progresses. Consider the HALT related numerical values and procedures a general guideline. Each product that is destined for the HALT process will dictate its own unique set of test values and stress steps. Accept the ambiguity that is intrinsic to an explorative development test. This standard applies to a diversified mix of product segments, including electronic assemblies, electro-mechanical assemblies, and may be applicable to certain mechanical assemblies as well.