Tools for Lean Six Sigma
Give me a lever long enough and I can move the world.
Gathering Numeric Data
- Are you gathering data that you can count, like number of people or defects? Yes
- Are you gathering data that you can measure, like money, length, weight, or time? Yes
- Is your data measured periodically over time (minute, hour, day, project, event)?
Use a line graph
- Are you using data to focus the improvement effort?
Use a Pareto Chart or pie chart
- Are you trying to prove a cause-effect relationship between two variables (e.g., calories consumed and weight gain?
Use a Scatter Plot
- Are you trying to determine the stability of the process?
Use a Control Chart
- Are you trying to determine the capability of the process?
Use a Histogram
- Are you comparing data year over year or month over month?
Use a Bar Chart
Organizing verbal or written data
- Are you trying to simplify a large number of written ideas?
Use a Affinity Diagram
- Are you trying to determine the driving issues among the simplified data?
Use a Relationship Diagram
- Are you trying to create links from higher level ideas or activities to more detailed ones?
Use a Tree Diagram
- Are you trying to evaluate the relationship between two sets of tangible criteria?
Use a Matrix Diagram
- Are you trying to evaluate the possible failure or fault points?
Use a PDPC Chart or EMEA/FMEA--Error Modes and Effects Analysis
- Are you trying to create a sequence of activities?
Use an Arrow Diagram
Additional Tools for Improving the Process
Key Tools for Sustaining Improvement--Process Management
Do you need to: