Lean Six Sigma Refresher
Client Acceptance Letter
A Lean Six Sigma (LSS) Client Acceptance Letter is a formal document used at the end of a process improvement project to confirm that the client (internal or external) agrees the deliverables have been completed to satisfaction. Itβs essentially the sign-off that closes the project and transitions ownership of the improved process back to the client or process owner.
π Purpose
Formal Approval: Confirms the client accepts the project outcomes, solutions, or deliverables.
Closure: Marks the official end of the LSS project and the beginning of the control phase.
Accountability: Documents that the client has reviewed and agreed to the improvements.
Transition: Transfers responsibility for sustaining improvements to the process owner or client team.
𧩠Typical Contents
Project Information β Title, sponsor, and team details.
Summary of Deliverables β What was implemented (process changes, tools, training, metrics).
Acceptance Statement β A formal declaration that the client acknowledges and approves the results.
Responsibilities Going Forward β Notes on sustaining controls, monitoring KPIs, and ownership.
Signatures β Client, project sponsor, and sometimes the LSS Belt leading the project.
β Value in Practice
Provides clear documentation that the project met agreed objectives.
Prevents disputes by recording client approval.
Reinforces continuous improvement culture by ensuring accountability for sustaining gains.
Serves as a record for audits or certification requirements.
Takeaway: The LSS Client Acceptance Letter is the final handshakeβit ensures both sides agree the project is complete, successful, and ready to be sustained.