You are managing a project to develop a new mobile application. During the quality control process, you identify several defects. You want to determine the root causes of these defects to prevent recurrence. Which two tools or techniques should you use? (Choose two.)
A cause-and-effect diagram, also known as a fishbone or Ishikawa diagram, helps identify potential root causes of a problem by categorizing them. It is specifically designed for root cause analysis, making it appropriate for determining why defects occur. By breaking down causes into categories like people, methods, and materials, it facilitates a systematic investigation.
Why this answer
The cause-and-effect diagram and the 5 Whys are both root cause analysis techniques. The cause-and-effect diagram helps categorize potential causes, while the 5 Whys drills down to the underlying reason. Together, they effectively identify why defects are occurring, enabling the project team to implement corrective actions and prevent recurrence.
Exam trap
The trap here is confusing tools that prioritize or monitor defects with those that actually analyze root causes.