What should an ISO 9001 internal audit checklist for production include?

Questions written for the floor, each tied to a clause, with the evidence to look for and how much to sample. This one has 46 questions in 11 processes: receiving, planning, work instructions, calibration, nonconforming product, corrective action, traceability, competence, change control, customer property and shipping.

Who can carry out an internal audit of a production area?

Anyone trained to audit who does not work in or manage the area. ISO 19011 asks auditors to be independent of the activity audited wherever practicable: a quality engineer from assembly auditing molding works, the molding supervisor auditing molding does not.

What is the difference between a major and a minor nonconformity?

A minor is an isolated miss where the process still controls the product. A major puts in doubt whether the process is under control or the product meets requirements, or is a pattern of minors on one requirement. Your audit programme sets the grades and the response times.

Should I use ISO 9001:2015 or ISO 9001:2026 clause numbers?

Use the edition your certification body audits you against. ISO 9001:2026 was published on 16 September 2026 and 2015 certificates stay valid until 30 September 2029, so many plants are still audited to 2015. This checklist uses the 2015 clause numbers.

How is this different from a layered process audit or a gemba walk?

An internal audit checks the whole quality system against its requirements, done by trained, independent auditors on a plan, with graded findings. A layered process audit repeats a few high-risk checks every shift across leadership layers. A gemba walk is leaders observing and asking, with no grades.

Free template

Updated October 9, 2026

ISO 9001 internal audit checklist (production area)

An ISO 9001 internal audit checklist is the auditor's plan for checking that an area works the way its quality system says it does: the questions to ask, the clause each one tests, the evidence to look for and how much of it to sample. This one is written for the production floor. It has 46 questions in 11 processes, from receiving and incoming inspection to release and shipping, each citing its ISO 9001:2015 clause number and title, with what to look for and a sample size for each process. Every question is graded conforming, opportunity, minor, major or N/A against the evidence you saw, never a bare yes or no. Page 1 of the PDF is the audit plan with an independence check, pages 2 to 6 the questions, then a finding report, a findings log, how to run the audit and a worked example. The Excel version counts the grades, works out conformance by process and by clause, keeps the findings log with owners, due dates and overdue flags, and fills in a finding report for any finding. The clause numbers follow ISO 9001:2015. ISO 9001:2026 was published on 16 September 2026 and 2015 certificates stay valid to 30 September 2029, so check which edition your certification body audits you against.

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Page 1 of the ISO 9001 internal audit checklist — 46 questions in 11 processesISO 9001:2015 clause for eachWhat to look forSample per processFive grades definedIndependence checkFindings log with due datesFinding reportSummary by clause and processWorked example

When to use it

When to use an ISO 9001 internal audit checklist

When the audit programme says the production area is due, or sooner after complaints, a run of scrap or a big change such as a new line or a new product.
A few months before a surveillance or recertification audit, to find the gaps while there is still time to close them.
To train new internal auditors: the questions, what to look for and the sample sizes show what an evidence-based audit looks like on the floor.
After the actions from the last audit are closed, to check on the floor that they held.

How to fill it in

1
Plan from risk
Choose the area and its processes from the audit programme: what matters most to the product, recent complaints and changes, and what the last audit found. Fill in the audit plan on page 1 and send it to the area owner a few days ahead.
2
Pick auditors who do not work in the area
ISO 19011, the guidance standard for auditing management systems, asks auditors to be independent of the activity they audit wherever practicable. The plan asks the question outright: if an auditor works in or manages the area, change the auditor or write down why you cannot.
3
Open, then go to the floor
Hold a 15-minute opening meeting with the area owner, then start at the stations. Watch the work, ask the people doing it, and only then check the records. Pick the samples yourself at the station, not from a list the area hands you.
4
Write the evidence, then grade
For every question, conforming ones too, write what you sampled: record numbers, gauge IDs, stations, people. Then grade it conforming, opportunity, minor, major or N/A. Grade each problem once, under the question it fits best.
5
Write each finding in four parts
Condition: what you saw. Criteria: the requirement it fails, from the site's procedure, the customer or the ISO 9001 clause. Evidence: what someone else can go and check. Impact: what could go wrong. With no requirement there is no nonconformity, and with no evidence there is no finding.
6
Close the audit
Agree the facts with the area owner before you leave. The grades are the auditor's call; the owner and due date of each finding are agreed in the closing meeting.
7
Follow up until it works
The owner fixes the problem now, finds the cause and acts on it. Close a finding only after someone checks with data that the action worked, and feed the results into the next audit plan and management review.

Writing findings, and what this audit is not

A finding in four parts, and how an internal audit differs from an LPA and a gemba walk

A finding the area owner can act on states what was seen, the requirement it fails, the evidence someone else can check and what could go wrong. The example is the major finding from the molding audit below.

The major finding, written in four parts

Example numbers

Condition: Caliper C-118, used to release parts at press 4, was 6 weeks past its calibration date and not in the register. 9 lots released with it; 5 shipped.
Criteria: 7.1.5.2 Measurement traceability, and the site's calibration procedure: every gauge used to accept product is registered and in date.
Evidence: The caliper at the press 4 inspection table, the register with no entry, release records for lots 3301 to 3309.
Impact: Parts may have been accepted on readings nobody can trust, and new gauges can reach the floor unregistered.

With no requirement there is no nonconformity, and with no evidence there is no finding (ISO 9001 Auditing Practices Group, Nonconformity: documenting).

Three ways of checking the floor

Internal audit (this checklist)
Checks the whole quality system against its requirements: the site's procedures, the customer's and ISO 9001. Trained auditors from outside the area, on a planned programme, with graded findings closed by corrective action.
Layered process audit
A few high-risk checks at one station, repeated every shift by every layer of leadership, from team leader to plant manager.
Gemba walk
Leaders go to where the work is done to see, ask and help. No grades and no findings; what they see turns into actions and coaching.

Use all three: the gemba walk and the LPA every day or week, the internal audit on the programme's schedule.

How findings are graded

Conforming, opportunity, minor, major: what each grade means

The grades this template uses, worded for a production audit. Certification bodies grade major and minor nonconformities along the same lines (ISO/IEC 17021-1). Your own audit programme decides the grades and the response times, so change them to match it.

Grade	When to use it	Example	What happens next
Conforming	Every sample you checked meets the requirement, and you wrote down what you saw.	5 of 5 resin certificates received and checked against the specification.	Nothing to fix. The evidence noted shows the next auditor what was sampled.
Opportunity	The requirement is met, but you see a risk or a better way. Never use it to soften a requirement that is not met.	Regrind bins left open beside a running press; no contamination found.	The area owner decides whether to act. No due date is required.
Minor	A requirement is not met in an isolated case, and the process still controls the product.	Two boxes of rejects under a bench with no hold tag.	Correction now, cause and corrective action by a due date the audit programme sets, then a check that it worked.
Major	A requirement is not met in a way that puts in doubt whether the process is under control or the product meets requirements, or several minors on one requirement show the system is failing.	A gauge used to release product 6 weeks past its calibration date and missing from the register, with product shipped.	Contain at once (stop, hold, review the product), then cause and corrective action, then a check that it worked. Some sites re-audit the area.
N/A	The question does not apply to this area or there was nothing to sample. Say why.	No temporary process changes in the last 6 months.	Left out of the conformance figure.

Conforming
When to use it
Every sample you checked meets the requirement, and you wrote down what you saw.
Example
5 of 5 resin certificates received and checked against the specification.
What happens next
Nothing to fix. The evidence noted shows the next auditor what was sampled.
Opportunity
When to use it
The requirement is met, but you see a risk or a better way. Never use it to soften a requirement that is not met.
Example
Regrind bins left open beside a running press; no contamination found.
What happens next
The area owner decides whether to act. No due date is required.
Minor
When to use it
A requirement is not met in an isolated case, and the process still controls the product.
Example
Two boxes of rejects under a bench with no hold tag.
What happens next
Correction now, cause and corrective action by a due date the audit programme sets, then a check that it worked.
Major
When to use it
A requirement is not met in a way that puts in doubt whether the process is under control or the product meets requirements, or several minors on one requirement show the system is failing.
Example
A gauge used to release product 6 weeks past its calibration date and missing from the register, with product shipped.
What happens next
Contain at once (stop, hold, review the product), then cause and corrective action, then a check that it worked. Some sites re-audit the area.
N/A
When to use it
The question does not apply to this area or there was nothing to sample. Say why.
Example
No temporary process changes in the last 6 months.
What happens next
Left out of the conformance figure.

What's on the checklist

The 46 audit questions, by process

Eleven processes, with the sample to take for each. Every question ends with the ISO 9001:2015 clause number and title it tests; the clause tells you which requirement to read before you write a finding, and the questions are this template's own words. On the sheet each one has room for the evidence you saw, a grade and a finding number.

Receiving and incoming inspection

Sample: 5 receipts from the last 3 months from at least 3 suppliers, plus one rejected or held lot if there is one.

1Pick a receipt from today and follow it: was it checked the way the inspection plan sets for that part and supplier before it went to stock? Look for: the inspection plan, the inspection record, the stock location and its status. (8.4.2 Type and extent of control)
2How was the amount of incoming checking set for each supplier, and when was it last changed after a supplier problem? Look for: supplier ratings or a skip-lot rule, one recent change and its reason. (8.4.2 Type and extent of control)
3Do the certificates or test reports the purchase order asks for arrive with the material, and does someone compare them with the specification? Look for: the requirement on the purchase order, the certificate, the recorded check. (8.4.2 Type and extent of control)
4Are material waiting for inspection, accepted material and rejected material kept apart and marked, so nobody can use the wrong one? Look for: a marked hold area, tags or labels, the system status matching the tag. (8.5.2 Identification and traceability)
5When a lot failed incoming inspection, was it recorded and held, and was the supplier asked for a response? Look for: the nonconformance report, the hold tag, the supplier corrective action request and its status. (8.7 Control of nonconforming outputs)

Production planning and control

Sample: 3 jobs running now and 2 closed in the last month, from different lines or shifts.

6Does each running job have a released work order with the current drawing or specification revision, the quantity and the route? Look for: the work order at the machine, its revision against the controlled master. (8.1 Operational planning and control)
7Were material, tooling, programs and people confirmed before the job started, and what happens when one is missing? Look for: a kitting or pre-start check, the shortage list, one late start and its reason. (8.1 Operational planning and control)
8Are the machines in the sample maintained to their plan, and are overdue preventive maintenance tasks visible to the area? Look for: the PM schedule and completion records, open breakdown work orders. (7.1.3 Infrastructure)
9Does the area track its process measures (scrap, first pass yield, on-time output), are they current, and what was done the last time one missed? Look for: the board or report, the last miss and its action. (9.1 Monitoring, measurement, analysis and evaluation)
10Has someone looked at what can go wrong in this process (a risk list, a PFMEA or similar), and are the actions from it in place on the floor? Look for: the risk record for this process, one action traced to the station. (6.1 Actions to address risks and opportunities)

Work instructions and process control

Sample: 4 stations, including the newest operator in the area and a job started this shift.

11Is the instruction at the station the current revision, readable, and the same as the controlled copy? Look for: the revision at the station against the document system, uncontrolled copies, handwritten changes. (7.5.3 Control of documented information)
12Ask the operator to talk you through the job: does the work match the instruction, step by step? Look for: the steps you watch against the sheet, any step done differently and why. (8.5.1 Control of production and service provision)
13Are machine settings (temperature, pressure, speed, torque) inside the limits the instruction or control plan sets, and checked as often as it says? Look for: the settings on the machine, this shift's check sheet. (8.5.1 Control of production and service provision)
14Where a result cannot be fully checked afterwards (welding, heat treating, sealing, bonding), is the process validated and run as validated, by qualified people? Look for: the validation record, the settings in use, the operator's qualification. (8.5.1 Control of production and service provision)
15Is the first piece approved and recorded before the run, and are in-process checks done at the set frequency? Look for: the first-piece record with time and signature, the in-process check sheet for this run. (8.6 Release of products and services)
16Are the conditions the process needs in place (lighting, cleanliness, temperature or humidity where the product needs it)? Look for: the conditions the instruction asks for, a reading or log where one is required. (7.1.4 Environment for the operation of processes)

Calibration and measuring equipment

Sample: 6 gauges in use today, picked at the stations rather than from the calibration list, including one used to release product.

17Does every gauge in use carry an ID and a calibration status, and is it in date? Look for: the ID and label on the gauge, the due date in the calibration register. (7.1.5.2 Measurement traceability)
18Can the calibration record show what the gauge was checked against, and that the reference traces to national or international standards? Look for: the certificate, the reference standard, the lab's accreditation for outside calibration. (7.1.5.2 Measurement traceability)
19When a gauge was found out of tolerance at calibration, was the product measured with it since its last good calibration reviewed? Look for: the out-of-tolerance record, the lots reviewed, the decision and who made it. (7.1.5.2 Measurement traceability)
20Is each gauge fit for the measurement it is used for: resolution against the tolerance, and a gauge study where the control plan asks for one? Look for: the drawing tolerance, the gauge resolution, the gauge R&R result. (7.1.5 Monitoring and measuring resources)
21Are gauges protected from damage and from adjustments that would make readings wrong? Look for: storage at the station, seals on adjustable settings, damaged gauges still in use. (7.1.5.2 Measurement traceability)

Nonconforming product

Sample: the hold area today and 3 nonconformance reports from the last 3 months, one involving the customer if there is one.

22Is every suspect or rejected part in the area tagged, kept apart and recorded? Look for: the hold area, tags against the nonconformance log, parts on benches or under machines with no tag. (8.7 Control of nonconforming outputs)
23For each report in the sample, is the decision recorded (rework, scrap, use as is, return) with who authorized it? Look for: the disposition, the name, the date. (8.7 Control of nonconforming outputs)
24Where parts were used as is or repaired, was customer agreement obtained when the contract needs it, and were reworked parts checked again? Look for: the concession or deviation, the re-inspection record. (8.7 Control of nonconforming outputs)
25When a problem was found after shipping, was the suspect stock traced and contained and the customer told? Look for: the containment record, the lots traced, the message to the customer. (8.7 Control of nonconforming outputs)

Corrective action

Sample: 3 corrective actions closed in the last 6 months (one from a complaint, one from an audit) and the open list.

26Was containment done first, and was the cause proven rather than assumed? Look for: the containment record, a 5 whys, fishbone or trial that confirms the cause. (10.2 Nonconformity and corrective action)
27Does the action remove the cause, and is it in place on the floor today, not only in the report? Look for: the changed instruction, fixture, setting or training, seen at the station. (10.2 Nonconformity and corrective action)
28Was effectiveness checked with data after the action, and was the action closed only after that check? Look for: the effectiveness check, the period of data, who closed it and when. (10.2 Nonconformity and corrective action)
29Are actions closed by their due dates, and are late ones escalated? Look for: the open list, the oldest open action, due dates against today. (10.2 Nonconformity and corrective action)
30Were the findings from this area's last internal audit corrected and closed, and has any of them come back? Look for: the previous audit report, closure evidence, repeat findings. (10.2 Nonconformity and corrective action)

Identification, traceability and preservation

Sample: 3 lots, finished or in process: trace each one back to its material and forward to its shipment or location.

31Pick a finished part or container: can you trace it back to the material lot, machine, shift and inspection records, and forward to where it went? Look for: the label, the traveler or system record, the material certificate, the shipping record. (8.5.2 Identification and traceability)
32Is work in process identified at every stage (part number, revision, status), including parts left between shifts? Look for: labels on work in process, unlabeled containers, mixed parts. (8.5.2 Identification and traceability)
33Is product protected from damage, contamination and deterioration while it is handled, stored and moved, and is shelf-life material used in date? Look for: damaged or overstacked parts, open containers, expiry labels, first in first out lanes. (8.5.4 Preservation)

Competence and training

Sample: 5 people working in the area today, including a new starter and a temporary worker if there is one.

34Is each person in the sample qualified for the job they are doing today, by the training matrix or skills record? Look for: the person on the matrix at the level the job needs, and the date. (7.2 Competence)
35How was competence confirmed: by watching the person do the job to standard, not only a signed attendance sheet? Look for: a trainer's sign-off after observation, a test or a check. (7.2 Competence)
36Are trainees supervised, and are expiring qualifications (welding, inspection, forklift) caught before the person works alone? Look for: expiry dates, the refresher plan, who supervises each trainee. (7.2 Competence)
37Can operators say what makes a good part at their station and what to do with a bad one? Look for: their answers, compared with the instruction and the reaction plan. (7.3 Awareness)

Change control

Sample: the last 3 changes to the area (a process, a document, a machine or tool) from the change log or maintenance records.

38Was each change reviewed before it was made: who approved it, what it could affect, and what checks were planned? Look for: the change request, the approval, the risk review. (8.5.6 Control of changes)
39After the change, were the first parts checked, and were the instruction, control plan, training and gauges updated? Look for: first-off results after the change, the new revision, training records. (8.5.6 Control of changes)
40Were temporary changes (substitute material, another machine, a bypassed check) approved, limited in time or quantity, and ended on time? Look for: the deviation, its end date or quantity, the return to normal. (8.5.6 Control of changes)
41When a document changed, were old copies removed from the floor and the reason for the change recorded? Look for: superseded copies at stations, the revision history. (7.5.3 Control of documented information)

Customer property

Sample: every item of customer-owned material, tooling, gauges or packaging in the area; there are often fewer than 10.

42Is customer-owned property (material, molds, fixtures, gauges, returnable packaging) identified as the customer's, recorded, maintained and protected? Look for: tags or marks, the customer property register, maintenance records for customer tooling. (8.5.3 Property belonging to customers or external providers)
43When customer property was lost, damaged or found unsuitable, was the customer told and was it recorded? Look for: the record and the message to the customer. (8.5.3 Property belonging to customers or external providers)

Release and shipping

Sample: 3 shipments from the last week and one being prepared today.

44Was each lot released by an authorized person only after all the planned checks were done and passed? Look for: the final inspection record, who released it, the release date against the ship date. (8.6 Release of products and services)
45If product went out before all checks were complete, was that approved by the person with authority and, where needed, the customer? Look for: the approval record, the customer's agreement. (8.6 Release of products and services)
46Do labels, packaging and paperwork match the order and the customer's packaging requirements (part number, revision, quantity, lot)? Look for: the packing list against the order and the label, the customer packaging specification. (8.5.4 Preservation)

A filled-in example

Illustrative, not a benchmark

An example: an internal audit of a molding area, presses 1 to 6 with the resin store, final inspection and shipping (illustrative, the same as the Excel example sheets and pages 10 and 11 of the PDF).

The molding audit in one picture

Conforming: 36 questions
Opportunity: 2 questions
Minor or major: 5 questions
N/A: 3 questions

Conformance = (conforming + opportunity) ÷ graded

Graded = all 46 questions except the 3 N/A

(36 + 2) ÷ 43 = 38 ÷ 43= 88.4%

Conformance88.4%

N/A questions are left out. Opportunities count as conforming: the requirement was met.

46 questions: 3 N/A (no temporary changes in 6 months, no customer property lost, no lot released early), so 43 graded.
36 conforming and 2 opportunities: a daily scrap tally by press, and lids on the regrind bins.
4 minor: an unreadable setup sheet at press 5, two boxes of untagged short shots, a trainee running a press alone on nights, and a corrective action closed with no effectiveness check.
1 major: the caliper used to release parts at press 4 was 6 weeks past its calibration date and missing from the register, and 5 of the 9 lots it released had shipped. Calibrated the next day, it was in tolerance, so the lots stood.

Conformance = (36 + 2) ÷ 43 = 88.4%. Nonconforming product and competence score lowest, at 75%. Three weeks on, 1 of the 7 findings is closed and verified, 1 is overdue, and the major stays open until the monthly gauge sweeps show no unregistered gauge.

Common mistakes

Yes or no answers
A ticked box shows nothing the next auditor or the certification body can check. Write what you sampled for every question, conforming ones too.
Auditing the documents, not the process
Reading procedures in an office only proves the paperwork exists. Start at the station, watch the job, then trace back to the instruction and the records.
Auditing your own area
People miss their own blind spots and go easy on their own findings. Swap auditors between areas; in a small site, at least keep people off their own work.
Calling a nonconformity an opportunity
If a requirement is not met, it is a minor or a major. Softening it gets it less attention, and it comes back at the next audit.
No follow-up
A finding closed when the action is done, rather than when it is shown to work, returns at the next audit. Check with data, then close.

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