‘Scatter Diagram’

Submitted by,

Aswathy.S.G

THE ‘SEVEN SIMPLE & OLD TOOLS’

• Flowcharts

• Cause and Effect (Ishikawa / fishbone) Diagrams

• Check sheets

• Pareto Charts

• Histograms

• Run Charts and Control Charts

• Scatter plots and Correlation Analysis

Professor Ishikawa -based on statistical techniques

Facilitate successful accomplishment of quality improvement objectives

Tools of TQM

• Tools for generating ideas• Check sheet• Scatter diagram• Cause and effect diagram

• Tools to organize data• Pareto charts• Process charts (Flow diagrams)

• Tools for identifying problems• Histograms• Statistical process control chart

Seven Tools for TQM

SCATTER DIAGRAMsimple graphical device to depict the

relationship between two variables.

composed of a horizontal axis containing

the measured values of one variable and a

vertical axis, representing the measurements

of the variable.

displays the paired data as a cloud of

points. The density and direction of the cloud

indicate how the two variables influence

each other

STEPS OF SCATTER DIAGRAM

Select variables which is related to each other

Collect Data

Create Scatter diagramX axis – cause or independent variablesY axis –effect or dependent variables

Examine the shape of cloud of points

Determine the type and strength of mutual relations

1. POSTIVE CORELATION

2.NEGATIVE CORELATION

3. NO CORELATION

TYPES OF CORRELATION