Old drawings are used on the shop floor

This is one cause behind related problems such as Corrective actions are never closed. Revised drawings reach the office but old copies stay at the machine. The checks below concentrate on this cause rather than repeating the full symptom diagnosis. At the inspection report and batch traveller, the quality inspector can usually see the earliest warning. Revised drawings reach the office but old copies stay at the machine. Check it before staff spend time correcting work that has already moved on.

What it looks like

• The quality inspector has to search the inspection report and batch traveller before answering a routine question.
• Revised drawings reach the office but old copies stay at the machine.
• Staff cannot locate the approved specification and measured sample for the latest case.
• People spot the gap after suspect product continues to the next stage or customer.
• The open case has no documented owner, due date or proof of closure.

Why it happens

The specific failure is left unchecked. Revised drawings reach the office but old copies stay at the machine. If there is no recorded owner for that condition, the effect travels to the next team.

The work and its evidence move separately. The quality decision may be documented after work has already moved to the next operation.

A later hand-off exposes the gap. A defect label alone does not identify the affected batch, process setting or containment decision.

The less obvious cause: A control may exist on paper but still fail in practice. Test whether someone actually performs this check: compare physical prints against the controlled drawing register.

Find the first failed hand-off before changing staff targets. A completed register alone cannot prove that physical work happened.

What to check first

1. Check revision numbers on three machine-side drawings. Compare dates, quantities and references. Mark an unconfirmed difference as unverified. Finish the first pass in under 30 minutes and name the missing source if needed.
2. Compare physical prints against the controlled drawing register. Record the affected item or party and the person who can verify the detail. Finish the first pass in under 30 minutes and name the missing source if needed.
3. Trace who distributes and withdraws superseded versions. Mark each exception open, waiting for evidence or resolved, with a named next owner. Finish the first pass in under 30 minutes and name the missing source if needed.

How to fix it

1. Start with one live case. Check revision numbers on three machine-side drawings. Keep the source reference before changing the record.
2. Make the control explicit. Mark the current released revision at every work point. Put the rule in the register or sheet that staff already use.
3. Set a second guardrail. Collect or clearly invalidate older drawings when revisions arrive. Preserve the affected batch, settings and inspection evidence before adjusting the process. Rework requires the same traceability as normal production.
4. Assign the next decision. The quality inspector records the action and its due date. A separately authorised person signs off changes affecting money, safety or customer terms.
5. Review the open list. Start with items affecting today or tomorrow. Keep third-party commitments separate from completed actions.
6. Check whether the rule holds. For four weeks, count recurring defects, rework or batches without verified acceptance evidence. Reopen repeat cases and identify where the control failed.

Copy this defect, containment and action log into a register or sheet:

Retain the source reference and limit access to authorised staff.

A worked example

Illustrative example only. A workshop machines 160 components to revision B after revision C was approved. Start by locating the source that would verify these amounts or quantities. The quality inspector records the exact exception, gives it an owner and checks the next relevant event. This example shows how to structure the decision. It does not claim that a business achieved a saving or avoided a loss.

How you know it is fixed

• Completeness: Count recurring defects, rework or batches without verified acceptance evidence at the same time every week. Record the count and the oldest item, rather than just saying things are better.
• Timeliness: Check whether the assigned person took the next action before the agreed cut-off. Keep missed dates visible instead of replacing them silently.
• Proof of closure: Sample three closed cases and locate the approved specification and measured sample. A tick without supporting evidence is still an open control gap.

When it is more serious

Wrong revisions for load-bearing or certified products need containment. Stop affected work and seek a competent technical or safety review if the case can harm people or release unsafe goods. For contracts, tax, wages or legal rights, retain source documents and consult a qualified adviser. Repeated exceptions after four reviews may require changing the control.

This works if someone does it every day. In most businesses, that someone is you.

Questions people ask

What should we check before taking action?

Check revision numbers on three machine-side drawings. Keep its date and reference. Then compare it with the approved specification and measured sample; if they disagree, record the difference before changing either one.

Who should own the next action?

The quality inspector should own the open item. The person authorised to change money, a technical standard or a customer commitment must still approve that decision.

Can we run this control without new software?

No. Start with a shared sheet or register containing the reference, owner, promised date, status and evidence. Once those fields are reliable, decide whether a system connection is worth setting up.

When is the issue serious enough to escalate?

Wrong revisions for load-bearing or certified products need containment. Keep supporting records and get specialist help where relevant.