IMPROVE PHASEIMPROVE PHASE

Purpose of the Improve Purpose of the Improve PhasePhase

Develop, test and implement Develop, test and implement solutions to improve the process solutions to improve the process by reducing variation in the by reducing variation in the critical output variables caused critical output variables caused by the vital few input variablesby the vital few input variables

Demonstrate with data that the Demonstrate with data that the solutions worksolutions work

Purpose of the Improve Purpose of the Improve PhasePhase

Generate ideas for improving the Generate ideas for improving the process, analyze and evaluate those process, analyze and evaluate those ideas, select and test the best ideas, select and test the best potential solutions, plan and potential solutions, plan and implement the solutions, and implement the solutions, and validate the results with data and validate the results with data and statistical analysisstatistical analysis

Improve Phase ToolsImprove Phase Tools

Correlation and regression Correlation and regression analysisanalysis

DOE planningDOE planning DOE, both full factorial and DOE, both full factorial and

fractional factorialfractional factorial

Improve Phase ToolsImprove Phase Tools

Correlation is a measure of the Correlation is a measure of the relation between two or more relation between two or more variablesvariables

Regression analysis is used to Regression analysis is used to construct relationships between a construct relationships between a dependent variable or response dependent variable or response variable ( Y) and one or more variable ( Y) and one or more independent or predictor independent or predictor variables ( X’s)variables ( X’s)

Improve Phase ToolsImprove Phase Tools

DOE PlanningDOE Planning Purpose:Purpose:

Use statistically designed experiments Use statistically designed experiments to identify the key process input to identify the key process input variables variables

Full factorial design:Full factorial design: Combines the levels for each factor with all Combines the levels for each factor with all

the levels for every other factorthe levels for every other factor

Fractional factorial design:Fractional factorial design: The team excludes some of the possibilitiesThe team excludes some of the possibilities

Improve Phase ToolsImprove Phase Tools

DOE PlanningDOE Planning

A level is a value or a setting for a A level is a value or a setting for a factor, an assignment of high or low factor, an assignment of high or low for the different states of the X’s for the different states of the X’s being used in the DOEbeing used in the DOE

Improve Phase ToolsImprove Phase Tools

DOE PlanningDOE Planning Designed experiments enable the Designed experiments enable the

team:team: To identify the most influential factors To identify the most influential factors

associated with a particular CTQ associated with a particular CTQ characteristiccharacteristic

And to define their relationshipsAnd to define their relationships

Improve Phase ToolsImprove Phase Tools

DOE PlanningDOE Planning Because a designed experiment Because a designed experiment

defines interactions between and defines interactions between and among various factors, it can yield among various factors, it can yield many revealing facts, allowing the many revealing facts, allowing the team to quickly improve its processteam to quickly improve its process

End of the Improve PhaseEnd of the Improve Phase

The Improve Phase concludes The Improve Phase concludes with a review of the project with a review of the project between the black belt and the between the black belt and the champion and with the phase champion and with the phase gate reviewgate review