Which of the following is NOT a primary technique used in Product Support Analysis (PSA)?

The correct answer identifies a technique that is not primarily associated with Product Support Analysis (PSA). Product Support Analysis focuses on assessing the various factors that can affect the life cycle of a product, including its reliability, maintainability, and the efficiency of support elements.

Mean Time to Repair (MTTR) is commonly used in the field of maintenance and reliability but is primarily a metric used to measure the average time taken to repair a failed component. While it supports the broader understanding of maintenance practices, it does not serve as a primary technique for analyzing product support requirements or structures.

In contrast, Reliability Block Diagrams, Failure Modes and Effects Analysis (FMEA), and Root Cause Analysis are all fundamental techniques utilized in PSA. Reliability Block Diagrams help visualize and analyze the reliability of systems by breaking down components and their interactions. FMEA is a systematic approach that evaluates potential failure modes within a system and their effects, enabling teams to prioritize issues based on risk. Root Cause Analysis focuses on identifying the underlying causes of failures to prevent recurrence, making it a vital aspect of maintaining effective product support.

Thus, the distinction lies in the fact that while MTTR informs maintenance practices, it does not constitute a core technique within the structured analytical framework associated with Product Support Analysis,