The Improve phase involves finding optimum values of response variables and major impact factors. It begins the process of actually composing the improvement project teams and providing Six Sigma and project-related training to the team members.
If at the Analyze Phase you define the Xs and the Ys, at the Improve phase, you now design experiments to understand the relationship between the Ys and the vital few Xs and major noise variables. This phase aims to generate actions for the implementation of the levels of the vital few Xs that optimize the shape, spread, and center of the distributions of the Ys; developing action plans; and conducting pilot tests of the action plans. This is based on Six Sigma for Green Belts and Champions: Foundations, DMAIC, Tools, Cases, and Certification
The Improve Phase has the following key concepts:
IMPROVE – Key Steps:
- Generate Solutions
- Select Solutions
- Implementation Planning
- Prepare Change Management Strategy
- Improve TollgateIMPROVE – Key Deliverables:
- Solution Design Developed and Documented
- Solution Validated on a Small Scale or Pilot
- Approved Cost Benefit Proposal for Validated Solution
- Implementation Plan Develop and ExecutedIMPROVE- Core Tools:
- Brainstorming
- Failure Mode & Effect Analysis
- Project Management
- Change Management
- Pareto Charts
- Sampling
- Segmentation
- Cost Benefit Analysis
- Prioritisation Techniques
- Design of Experiments
- Process Capability
- Stakeholder Analysis
- Frequency Plots
- Flow Charts (Process Maps)
- Process Sigma Stratification
DMAIC
Six Sigma Quick Reference Guide
