Select Defect Data for Analysis

• Gather relevant defect data. Examples of relevant defect data may include:
  • Project management problem reports requiring corrective action
  • Defects reported by the customer
  • Defects reported by end user
  • Defects found in peer reviews
  • Defects found in testing
  • Process capability problems
• Determine which defects and other problems will be analyzed further. When determining which defects to analyze further, consider the impact of the defects, the frequency of occurrence, the similarity between defects, the cost of analysis, the time and resources needed, safety considerations, etc. Examples of methods for selecting defects and other problems include:
  • Pareto analysis
  • Histograms
  • Process capability analysis