7 QC Tools

Overview

Cause and Effect Diagram (also called ‘Ishikawa’ or ‘Fishbone chart’): Identifies many possible causes for an effect or problem and sorts ideas into useful categories
Check Sheet: A structured, prepared form for collecting and analyzing data; a generic tool that can be adapted for a wide variety of purposes
Control Charts: Graphs used to study how a process changes over time
Histogram: The most commonly used graph for showing frequency distributions or how often each different value in a set of data occurs
Pareto Chart: Shows on a bar graph about the factors which are more significant
Scatter Diagram: Graphs pairs of numerical data, one variable on each axis to look for a relationship
Stratification: A technique that separates data gathered from a variety of sources so that patterns can be identified ( Flowchart, Run chart etc.)