Check Sheet – Defect Concentration Diagram | ASQ

Check Sheet

Check Sheet Procedure

  1. Decide what event or problem will be observed. Develop operational definitions.
  2. Decide when data will be collected and for how long.
  3. Design the form. Set it up so that data can be recorded simply by making check marks or X’s or similar symbols and so that data do not have to be recopied for analysis.
  4. Label all spaces on the form.
  5. Test the check sheet for a short trial period to be sure it collects the appropriate data and is easy to use.
  6. Each time the targeted event or problem occurs, record data on the check sheet.

Check Sheet Example

The figure below shows a check sheet used to collect data on telephone interruptions. The tick marks were added as data was collected over several weeks.

Check Sheet Example

Check Sheet Example

Create a Check Sheet

Start using the check sheet template to track up to 10 defects on each day of the week. This tool also creates a histogram, bar chart, and Pareto chart using the check-sheet data.

Excerpted from The Quality Toolbox, Second Edition, ASQ Quality Press.