Which of the following is NOT one of the five W's to be used in an REM?

The five W's in a REM (Root Cause Analysis and Corrective Action) framework typically include Who, What, When, Where, and Why. In this context, the key aspect of the analysis involves identifying the responsible parties (Who), the events or actions that occurred (What), and timing related to those occurrences (When). The additional element of Where is crucial for providing context about the physical location of events.

The option that is not included among the five W's is "Why." While understanding the reasons (why) behind an event can be beneficial, the core of the five W's framework focuses primarily on establishing the foundational facts (who, what, when, and where) to facilitate effective analysis and corrective measures. Thus, the correct response highlights that "Why" does not belong in this particular list of the five W's used in the context of an REM.