Many tools are used in process improvement and Six Sigma. This section lists some of the tools that can be used by process improvement teams with little training. The Team Tools section lists a number of other tools that are most often used in the course of a meeting; although the distinction between these two categories is blurred.

Box Plots (Box and Whisker Plots)	representing data sets graphically
Check Sheet	collecting data
CTQ Flowdown	translating customer requirements to measures
Decision Trees	choosing between course of action
Fault Tree Analysis	Identifying potential fault conditions
Gantt Chart	planning timescales
Failure Mode & Effects Analysis	identifying potential failures
Histogram	representing data categorically
Matrix Diagram	a simple form of QFD
Multi-Vari Chart	representing data
Pareto Chart	identifying most important problems
PERT Charts	planning problems
Quality Function Deployment (QFD)	converting customer requirements into product features
Run Chart	plots data in time order and identifies anomalies
Stem and Leaf Plot	an alternative to the histogram
Process Decision Program Chart	a type of decision tree