Six Sigma - Concepts

Six Sigma is a set of techniques and tools for process improvement.

Two project methodologies inspired by Deming's Plan–Do–Study–Act Cycle composed of five phases each.

 

DMAIC (Define- Measure-Analyse-Improve-Control) is used for projects aimed at improving an existing business process.

 

DFSS (Design for Six Sigma) is used for projects aimed at creating new product or process designs. IDDOV - Identify-Define-Design-Optimize-Verify

 

Six Sigma - Quality Management Tools

Thought Process Map - Helps to identify risks.

SIPOC - Supplier-Input-Process-Output-Customer - Defines boundaries of supplier and customer.

Process Map - Measure Risks

FMEA - Failure mode & Effective Analysis - Identify, Prioritize and Mitigate risks

Root Cause Analysis (RCA) - Helps to prevent from upcoming risks.

 

Six Sigma - Root Cause Analysis Techniques

5 Why - Determine the root cause of a Defect / Problem by repeating the question "Why?”

Failure Mode Effective Analysis (FMEA) - Identify potential failures and their causes and effects

Pareto Analysis - (80 - 20 rule. 80% outcomes results from 20% of causes)

Fish Bone Diagram / Ishikawa Diagram - Managers to track down the reasons for defects or failures.

 

Six Sigma - Metrics

1) Defects per Unit (DPU) = Total Number of Defects on all units / Total Units Produced