When to Do an RCA Study
An RCA study can be performed at any time during the software development cycle, although the requirements of a class of defects for input into the process may dictate when a study is appropriate. These defects, also known as sentinel events, dictate the timing of the study.
RCA is an expensive process, so a deliberate approach that includes establishing a set of criteria for cost-effectiveness should be established before the study is begun. Therefore, the most effective approach is to apply structure to the event selection process to ensure that the largest return on investment is realized for the resources that are applied. For example, if one very expensive defect is discovered by several customers, it may be effective ...
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