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Supplier audit checklist

A supplier audit is a visit to a supplier's site to check that the way they make and control your parts will keep producing good parts, not just that their paperwork is in order. It is done before approving a new supplier, after serious quality problems, or on a schedule for the suppliers that matter most. A process audit follows the parts: how material comes in, how the process is controlled and checked, whether a lot can be traced, what happens to bad parts and how they are packed and shipped. Scoring each question turns the visit into numbers that can be compared between suppliers and from one audit to the next. This template has 32 questions in eight sections, each scored 0 (not in place), 1 (major gaps), 2 (minor gaps) or 3 (in place, evidence seen), or NA, with space for the evidence. Page 2 has the score summary by section, example rating bands to replace with your own, and the findings and actions. The Excel version works out the score and percentage per section and overall, gives the rating from the bands you set, counts questions scored 0, charts the sections and has an actions log.

Free to use: print it, copy it and edit it for your team. Enter your name and work email once to download.

Page 1 of the supplier audit checklistFields for supplier, site, date, auditors and parts audited, the 0 to 3 score key, and questions in sections for quality management system, purchasing, process control, inspection and gauges, and identification and traceability.
32 audit questionsEight sectionsScore 0 to 3 or NAEvidence columnSection and total %Rating bandsFindings and actions

When to use it

When to use a supplier audit checklist

  • Before approving a new supplier or moving a part to a new supplier site.
  • After a serious quality escape or a run of rejected lots.
  • On a yearly or two-yearly schedule for your most important suppliers.
  • When a supplier changes its process, site or ownership.

How to fill it in

  1. 1

    Plan the audit

    Which parts and processes, who audits, and what records you will ask to see. Send the supplier the date and scope in advance.

  2. 2

    Follow your parts

    Start at their receiving dock and walk the process to shipping. Ask to see the records for a real lot of your parts.

  3. 3

    Score from evidence

    Score each question from what you see and the records, not from what you are told. Write the evidence for every score below 3.

  4. 4

    Add up the sections

    Score ÷ (3 × questions scored) per section and overall. NA questions are left out of the maximum.

  5. 5

    Agree the findings

    Go through the findings with the supplier before you leave, major and minor, and agree actions and dates.

  6. 6

    Follow up

    Check the evidence for each action, and set the next audit date by the result.

What's on the audit

The 32 questions on the supplier audit checklist

Eight sections that follow your parts through the supplier's process. On the sheet each question is scored 0 (not in place), 1 (major gaps), 2 (minor gaps) or 3 (in place, evidence seen), or NA, with space for the evidence.

Quality management system

How quality is planned and reviewed

  1. 1Procedures current, controlled and followed on the floor
  2. 2Internal audits done to plan, with findings closed
  3. 3Management reviews quality results and acts on them
  4. 4Quality objectives set and tracked with data

Purchasing and incoming material

Their own suppliers

  1. 5Approved list of sub-suppliers, with how each was approved
  2. 6Purchase orders state the specification, revision and quality requirements
  3. 7Incoming material inspected or verified before use, with records
  4. 8Sub-supplier performance reviewed and problems followed up

Process control

Making our parts

  1. 9Control plan or equivalent in place for our parts
  2. 10Work instructions at the workstation, at the current revision
  3. 11First-piece or setup approval before each run, with records
  4. 12Process settings monitored and recorded against limits
  5. 13Preventive maintenance planned and done on key equipment

Inspection, test and gauges

Checking our parts

  1. 14In-process and final inspection done to plan, with records
  2. 15Gauges identified, calibrated on schedule and traceable
  3. 16Gauge R&R studied for key characteristics
  4. 17Capability studied or monitored for special characteristics

Identification and traceability

Knowing what is what

  1. 18Material and parts identified at every stage, with their status (OK, hold, reject)
  2. 19A finished lot can be traced back to its raw material lots and process records
  3. 20Mix-ups prevented at changeovers and in storage
  4. 21Records kept for the retention time we require

Nonconforming product and corrective action

When something goes wrong

  1. 22Nonconforming product identified, segregated and recorded
  2. 23Disposition decided by someone authorized, and the customer told when required
  3. 24Root cause found and corrective action checked for effect
  4. 25Customer complaints and SCARs answered on time

Handling, storage and shipping

Getting parts to us undamaged

  1. 26Storage protects parts from damage, rust and contamination
  2. 27Stock rotated first in, first out, and shelf-life items controlled
  3. 28Packaging and labels meet our specification
  4. 29Final check before shipping: right part, quantity, labels and paperwork

People and training

Who does the work

  1. 30Training needs defined for each job, with records kept
  2. 31Operators trained on the current work instruction before working alone
  3. 32Inspectors qualified for the checks they do

A filled-in example

Illustrative, not a benchmark

An example: a first audit of a machined parts supplier, using example rating bands of 85% and 70% (illustrative numbers).

Scoring the example audit

Score = points ÷ maximum for the questions that apply

32 questions, 2 not applicable: 30 scored, maximum 90.

  1. 72 ÷ 90= 80%
BandApproved with actions
  1. Whole audit80%with actions
  2. Process control (lowest section)67%

72 points out of a maximum of 90, after 2 questions marked not applicable: 80 percent, in the approved with actions band between 70 and 85 percent.

With the example bands, 85% and over is approved and 70% up to 85% is approved with actions. The lowest section, process control at 67%, set the actions.
  • 30 of 32 questions scored, 2 not applicable: maximum 90.
  • Total score 72: 72 ÷ 90 = 80%, in the 'approved with actions' band.
  • One question scored 0: no gauge R&R on the key bore diameter.
  • Lowest section: process control at 67%, with setup approval not recorded on the second shift.

The supplier was approved with two actions: a gauge study within 30 days and setup records on every shift. A follow-up visit was booked for when both were due.

Common mistakes

  • Auditing the office

    Procedures in a binder say little. Spend most of the time where your parts are made.

  • Scoring without evidence

    A 3 should mean you saw it working and saw the records. Write down what you saw.

  • Letting a good total hide a zero

    A high overall score can hide a critical gap, such as no traceability. Decide before the audit which zeros stop approval.

  • No follow-up

    Findings without dates and a check of the evidence are forgotten by the next audit.

Download the template

Free to use: print it, copy it and edit it for your team. Enter your name and work email once to download.

Run this template in LeanSuite

In LeanSuite you build any audit in Lean Creator with points per answer and a pass mark, complete it on a phone or tablet with photo evidence where required, and every non-conformance becomes a tracked action with an owner.

See it in a 45-minute demo

FAQ

Supplier audit checklist: common questions

  1. A visit to a supplier's site to check that their quality system and the process that makes your parts are in place and working, scored against a checklist, with findings the supplier has to act on.

  2. A system audit checks that the quality management system exists and meets a standard. A process audit follows a specific part through receiving, production, inspection and shipping to check that the process is controlled in practice.

  3. Each question gets a score, here 0 to 3, from the evidence seen. The section and overall percentage is the score divided by the maximum for the questions scored. The rating bands, such as approved above 85%, are your company's choice.

  4. By risk and performance. Many companies audit new suppliers before approval, key suppliers every one or two years, and any supplier after a serious quality problem.

  5. The findings are agreed with the supplier, who sends an action plan with dates. You check the evidence for each action and set the next audit by the result.

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