Layered Process Audit Checklist: Free Template and Examples

A Layered Process Audit (LPA) checklist gives supervisors and managers a consistent way to verify critical process controls on the shop floor.

A good checklist is focused rather than comprehensive. It should cover the controls that matter most to the process and use questions that can be answered by observing the work.

If you're building an LPA program, having a consistent set of questions makes it easier for different management layers to audit the same critical controls. Download the free checklist below as a starting point for creating your own LPA.

What Should Be on an LPA Checklist?

LPA questions should come from the controls that are important to the process. Useful sources include the PFMEA, control plan, work instructions, previous audit findings, customer complaints, and recurring scrap or rework.

Depending on the process, a checklist might cover:

• Standard work: Is the current work instruction being used?
• Materials: Is the correct material being used at the station?
• Equipment: Is the machine parameter within the approved range?
• Tooling: Is the torque tool within its required calibration period?
• Error-proofing: Is the poka-yoke device active?
• Traceability: Is the required batch or serial number recorded?

Not every checklist needs all of these areas. Select the controls that are most relevant to the process being audited.

How to Write LPA Questions

Questions should be specific enough that the auditor knows exactly what to check.

The goal is to make each question objective and observable, rather than dependent on the auditor's opinion.

LPA Checklist Example

Consider an automotive assembly station where a component is fastened using a torque-controlled tool.

The checklist might verify that the current work instruction is being used, the correct component is at the station, the torque tool is within its approved range, and the error-proofing system is active.

During the audit, the supervisor finds the torque setting outside the approved range. They correct the setting, record the finding, and check what the station has built since the last verified check. Anything suspect gets segregated before it moves down the line.

A later audit verifies the setting held.

The checklist makes these critical controls easy to verify consistently without turning the LPA into a full process audit.

Keep the Checklist Relevant

A checklist should change when the process or its risks change.

Review it after significant process changes, recurring quality problems, new customer requirements, or findings that show the current questions are no longer sufficient.

Avoid adding questions simply to make the checklist more comprehensive. The goal is to check the controls that matter, not everything that could possibly be checked.