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L7 Six Sigma (Key themes in Six Sigma (7) (Pro-active management focusing…
L7 Six Sigma
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Definition
To reduce defects to a rate of 3.4 defects per million defect opportunities (translates into 99.99966% perfection)
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Relationship
With TQM
Six Sigma focuses on prioritizing and solving specific problems which are selected based on the strategic priorities of the company and the problems which are causing the most defects
TQM employs a more broad based application of quality measures to all of the company’s business processes.
With Lean
Lean is more broad in nature since it sets the broad objective of eliminating all waste, and recommends certain processes for achieving that
Six Sigma is more focused in nature since it a set of tools for achieving clearly defined improvements, which are likely to help make the company more lean.
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Six Sigma Implementation
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Sustain
Train Six Sigma Green Belts and Process-Improvement Team Leaders to speed up improvements and maintain achievements
DMAIC
Measure
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Tools:
- Fishbone Diagram
- Process Mapping
- Cause & Effect Matrix
- Preliminary Failure Mode & Effect Analysis (FMEA)
- Gauge Repeatability & Reproducibility (GR&R)
Analyze
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Tools:
- Five Why’s
- Tests for normality (Descriptive Statistics, Histograms)
- Correlation/Regression Analysis
- Analysis of Variances (ANOVA)
- FMEA (Failure Mode and Effect Analysis)
- Hypothesis testing methods
Define
Identify the problem, the requirements of the project and the objectives of the project
Focus on critical issues which are aligned with the company’s business strategy and the customer’s requirements
Applicable tools
- Project Charter
- Trend Chart
- Pareto Chart
- Process Flow Chart
Improve
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Tools:
- Process Mapping
- Process Capability Analysis (CPK)
- DOE (Design of Experiment)
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Control
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Tools:
- Control Plans
- Operating Flow Chart(s) with Control Points
- Statistical Process Control (SPC) charts
- Check Sheets
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