Is/Is Not Analysis

Structured comparison technique used in problem definition that clarifies boundaries by contrasting what the problem IS versus what it IS NOT across multiple dimensions (What, Where, When, How Much). Example: 'The defect IS on the front panel, IS NOT on rear panels. IS happening on Shift 1, IS NOT on Shift 2.' This contrast reveals clues about root causes and focuses investigation. Core tool in 8D methodology's D2 step.