Audit Trail

By Zama Ngcobo, Ms

A practical shop-floor note on audit trails, with revision history for drawings, paths and tooling choices.

Small misses in a CNC workshop tend to stack up fast: the tool photo that was never taken, the email with no cutter size, or the delivery note that left out the box count. Audit Trail is our note on keeping machining, tooling and dispatch records clear from the start.

Audit Trail is written for the paperwork that follows a CNC job after the machine stops. We note drawing issue codes, cutter changes, photo references and dispatch counts in plain South African workshop language.

Revision points checked at handover

• Drawing revision and machine date logged
• Setup photo saved with tool number visible
• Linked page points to the exact bit
• Customer naming style kept on record

Use this note beside the tooling pages and the journal entry for the job. One gives the cutter reference, the other explains the record trail around changes, sign-off and dispatch. That split helps when a buyer asks why a path, coating or sheet count changed after approval.

How CNC path sign-off lands in a Gauteng production week

Audit Trail covers the record behind a CNC job, from drawing changes to path updates and tooling swaps. Use it when the floor needs a clear revision history that can be checked later without digging through old messages.

Every entry starts with material, spindle setup and cutter size, not with guesswork from old mail. In Johannesburg shops, MDF dust and packed production boards can hide missing details until the second run. Durban humidity and Cape Town coastal air also affect how coated tooling is stored between sign-off and use.

Take the first image before chips cover the table or labels go missing from the box. A short printed note near the control can carry the path name, revision mark and who approved the tool swap. Later, that small step makes returns, remakes and dispatch queries easier to trace.

Workshop conditions that change records

A Gauteng dispatch note often needs more than a courier label and a part count. OR Tambo export collections, warehouse closing times and shared factory space all affect how much detail must sit on the handover sheet. Audit Trail treats an active workshop as it is, with running jobs, substitutions and interrupted loading.

Coastal storage needs closer attention where salt air can mark bare steel and packaging. Inland sites usually fight dust around rails, collets and cabinets, which changes what must be checked before restarting. During load-shedding, first-off approval and file version checks need a written time stamp.

Operated by Astros Marketing (Pty) Ltd from 2 Makro Place, Sunnyrock 1401.