PRINCIPLES OF SIX SIGMA

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PRINCIPLES OF SIX SIGMA

• ISE 412/512
• LECTURE 1
• WHAT AND WHY
• THOMAS E. SCOTT, PhD

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Thomas E. Scott, Ph.D.Kraft Family Scholar

• 27 years with GM
• Engineer
• Supervisor
• Manager
• Liaison
• OU since 1992
• Jazz, Reading

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SIX SIGMA OVERVIEW

• Objectives
• Define the Six Sigma Process
• Introduce the DMAIC Roadmap
• Link Six Sigma and Lean Methodologies
• Introduce some terms

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Six Sigma A business process improvement
approach for manufacturing and service processes
that seeks to

• Find and eliminate causes of defects and errors
• Reduce cycle time and cost of operations
• Improve productivity
• Better meet customer expectations
• Achieve higher asset utilization
• Improve Return on Investment

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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
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Six Sigma Problem Solving Methodology
Existing Business Processes
DEFINE
MEASURE
ANALYZE
IMPROVE
CONTROL
IMPROVED BUSINESS PERFORMANCE
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Brief Historical Overview

• Zero Defects
• Total Quality Management (TQM)
• Lean Manufacturing
• Six Sigma
• MAIC
• DMAIC
• Design for Six Sigma

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WHY NOT 3s?
2s 308,537 3s 66,807 4s 6,210 5s
233 6s 3.4
Process Capability Level
Defects per Million Opportunities
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Non-Defective
2s 69.10 3s 93.32 4s 99.38 5s 99.98 6s
99.99
Process Capability Level
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Explanation of 6s Hierarchy

• TOP DOWN
• Senior Executive
• Executive Committee Member
• Champion
• Master Black Belt
• Black Belt (Full time)
• Green Belt (part timer 25)
• Yellow Belt (specialist - as needed)
• Process owner

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Alphabet Soup

• Six Sigma (6s)
• DMAIC
• SIPOC
• CTQ
• COPQ
• DPO