Seven Basic Tools of Quality

Tree diagram

A form of flow chart. Maps out all possible outcomes. Useful for very complex tasks.

Control Chart

A graph used to study how a process changes over time. One of the "Seven basic tools of quality."

Seven basic tools of quality

1. Cause-and-effect diagram (also known as the "fishbone" or Ishikawa diagram) 2. Check sheet 3. Control chart 4. Histogram 5. Pareto chart 6. Scatter diagram 7. Statistical process control

Pareto Effect

80% of problems originate with 20% of the causes.

Flow Charts

A chart that maps a process. AKA process map. One of the "Seven basic tools of quality."

Pareto Chart

An descending-ordered histogram with a line that represents cumulative total. One of the "Seven basic tools of quality."

Scatter diagram

Childhood frolics graph. One of the "Seven basic tools of quality."

Cause and Effect Diagram

Fishbone or Ishikawa diagram. One of the "Seven basic tools of quality."

Histogram

Graphical distribution of occurrences. One of the "Seven basic tools of quality."

SPC

Statistical process control (run charts, etc.) One of the "Seven basic tools of quality."