7 Basic Tools of Quality

Scatter Diagram

Graphs pairs of numerical data , one per axis, to look for relationships

Control Chart

Graphs used to study how a process changes over time

Check Sheet

Structured, prepared form for collectig and analyzing data

Histogram

Most commonly used graph for showing frequency distributions

Pareto Chart

Shows on a bar graph which factors are more significant

5 Why's

The basis of Toyota's Scientific Approach / "To get to the root cause of an issue, one must ask themselves why 5 times and in doing so, the problem unmasks itself" - Taiichi Ohno

Flow Chart

Visual representation of a process

Kaoru Ishikawa

developed seven basic visual tools of quality so that an average person could analyze and interpret data

Ishikawa (Fishbone Diagram)

identifies many possible causes for a problem in the process by identifying the problem occurring and brainstorming underlying issues for the root cause