PRINCIPLES OF SIX SIGMA

1
PRINCIPLES OF SIX SIGMA

• ISE 412/512
• LECTURE 2-1
• DEFINE AND MEASURE (DMAIC)
• THOMAS E. SCOTT, PhD

2
6s Problem Solving Methodology
Existing Business Processes
Supplier
Inputs
Processes
Outputs
Customer

• Six Sigma Methodology
• Define
• Measure
• Analyze
• Improve
• Control

DMAIC
Quality Productivity Cost Profitability
Improved Business Performance
3
Six Sigma Premise

• The variation of the process
• (Voice of the Process)
• can use up no more than
• HALF
• of the specification limit
• (Voice of the Customer)

4
Six Sigma Problem Solving Methodology
Existing Business Processes
What is important?
DEFINE
MEASURE
How are we doing?
What is wrong?
ANALYZE
What needs to be done?
IMPROVE
How do we guarantee performance?
CONTROL
IMPROVED BUSINESS PERFORMANCE
5
DMAIC Define

• All about the OUTPUT
• What is important to the customer?
• DEFINE
• Scope and boundary
• Specify Measurable Defects
• Estimate the impact

6
DMAIC Define

• Business case with a project objective
• SIPOC analysis
• Voice of Customer analysis