Seven Quality Control Tools

NEW 7 QC TOOLS

1. Affinity Diagrams

For Pinpointing the Problem in a Chaotic Situation and Generating Solution Strategies

ò Gathers large amounts of intertwined verbal data (ideas, opinions, issues)

ò Organizes the data into groups based on natural relationship

ò Makes it feasible for further analysis and to find a solution to the problem.

Advantages of Affinity Diagrams

ò Facilitates breakthrough thinking and stimulate fresh ideas

ò Permits the problem to be pinned down accurately

ò Ensures everyone clearly recognizes the problem

ò Incorporates opinions of entire group

ò Fosters team spirit

ò Raises everyone’s level of awareness

ò Spurs to the group into action

Constructing an Affinity Diagram

¶ Select a topic

¶ Collect verbal data by brainstorming

¶ Discuss info collected until everyone understands it thoroughly

¶ Write each item on separate data card

¶ Spread out all cards on table

¶ Move data cards into groups of similar themes (natural affinity for each other)

¶ Combine statements on data cards to new Affinity statement

¶ Make new card with Affinity statement

¶ Continue to combine until less than 5 groups

¶ Lay the groups outs, keeping the affinity clusters together

¶ Next, complete the diagram

2. Relations Diagrams

For Finding Solutions Strategies by Clarifying Relationships with Complex Interrelated Causes

ò Resolves tangled issues by unraveling the logical connection

ò Allows for “Multi-directional” thinking rather than linear

ò Also known as Interrelationship diagrams

Advantages of Relations Diagrams

ò Useful at planning stage for obtaining perspective on overall situation

ò Facilitates consensus among team

ò Assists to develop and change people’s thinking

ò Enables priorities to be identified accurately

ò Makes the