Chapter 5_________________________________________________________________

The QC tools

Learning Objectives

1.• What are the QC Tools?

2.• Which are the techniques used in QC problem

solving?

3.• How to use the QC tools?

4 • How to use the QC tools as part of the QC 7-

step formula?

Quality Control

“QC consist of developing, designing, producing, marketing and servicing products and services with optimum cost-effectiveness and usefulness which customers will purchase with satisfaction”

Dr. Kaoru Ishikawa

“Base everything on the facts”

Using data (pg. 112)

Facts

Collect data

Processdata

Judge

ACT

What are the QC Tools?

Techniques used in QC activities for discovering problems, organizing information, generating ideas, analyzing causes, taking action, effecting improvements, and establishing control.

The 7 QC Tools

• Cause and effect diagram

The 7 QC Tools

• Cause and effect diagram• Pareto Diagrams

The 7 QC Tools

• Cause and effect diagram• Pareto Diagrams• Graphs

The 7 QC Tools

• Cause and effect diagram• Pareto Diagrams• Graphs • Check sheets

The 7 QC Tools

• Cause and effect diagram• Pareto Diagrams• Graphs • Check sheets• Histograms

The 7 QC Tools

• Cause and effect diagram• Pareto Diagrams• Graphs • Check sheets• Histograms• Scatter Diagrams

The 7 QC Tools

• Cause and effect diagram• Pareto Diagrams• Graphs • Check sheets• Histograms• Scatter Diagrams• Control Charts

Statistical Methods:

• Estimation an test hypotheses.• Design of Experiments.• Correlation Analysis.• Regression Analysis.• Orthogonal polynomials.• Binomial probability paper.• Simple analytical methods.• Multivariate analysis techniques.• Optimization methods.

7 New QC Tools:

• Relation diagrams.• Systematic diagrams.•Matrix diagrams.• Affinity diagrams.• Arrow diagrams.• Process decision program chart.•Matrix data analysis.

Other QC Methods

• Sampling techniques.• Sampling inspection.• Sensory inspection.• Reliability engineering.

Methods peripheral to QC:

• IE techniques.• VE techniques.• OR techniques.• Idea-generating strategies.

Conditions

• They should be easy to use.• They should be easy to understand.• They should be capable of being used by

everyone together.

How to use the QC Tools:Step 1: Establish Objective

Step 2: Select Tool

Step 3: Collect data

Step 4: Analyze data using QC tool

Step 5: Consider results and derive conclusion

Step 6: Act

QC 7-step formula & QC Tools• Step 1: Select the Topic Process charts

Outline the process Matrix diagrams Decide on the topic

• Step 2: Understand the situation and set targets

• Step 3: Plan Activities

• Step 4: Analyze Causes Summarize relationship between characteristics and causes

• Step 5: Consider and implement countermeasures

• Step 6: Check results

• Step 7: Standardize and Establish Control