The Six Sigma Handbook, Revised and Expanded, 2nd Edition

8.3. CHECK SHEETS

Check sheets are devices which consist of lists of items and some indicator of how often each item on the list occurs. In their simplest form, checklists are tools that make the data collection process easier by providing pre-written descriptions of events likely to occur. A well-designed check sheet will answer the questions posed by the investigator. Some examples of questions are: "Has everything been done?" "Have all inspections been performed?" "How often does a particular problem occur?" "Are problems more common with part X than with part Y?" They also serve as reminders that direct the attention of the data collector to items of interest and importance. Such simple check sheets are called confirmation check sheets