CAPM Practice: Demonstrate an understanding of common problem-solving tools and techniques

The scatter diagram has revealed a pattern (correlation), but correlation does not establish causation. The next step is root cause analysis to understand WHY defects cluster on Friday afternoons — possible causes include end-of-week fatigue, reduced review oversight, or process gaps at week's end. Addressing root causes will be more effective than reactive measures.

**Why not B:** The pattern revealed by the scatter diagram is an observed phenomenon, not an uncertain future event. Updating the risk register would be appropriate if there were a potential future threat, but the Friday defect spike is already occurring and needs investigation, not risk documentation.

**Why not C:** Adding a control chart would monitor defect trends over time but would not explain why defects spike on Fridays. The scatter diagram has already identified the pattern. The next logical step is to investigate the cause, not to add another monitoring tool.

**Why not D:** Implementing mandatory overtime on Fridays is a reactive measure that does not address the root cause of the defect spike. Without understanding why defects increase on Friday afternoons, adding overtime may not solve the problem and could even worsen fatigue-related issues.