Changeover Record

This record is one step in the Production Control programme. Using it to capture line-clearance checks, production-order output or a general stoppage produces a register you can't report on later.

ISO 9001 cl.8.5.1 sets out what has to be in place for production to run under controlled conditions. A changeover is exactly the point where those conditions are most likely to slip, which is why most of its sub-requirements map onto a specific section of this record.

ISO 9001 is voluntary everywhere, but what a changeover record is expected to prove depends heavily on which other standards a site is answering to at the same time.

The fields are simple to fill in. Whether the record is defensible comes down to four judgement calls that don't show up as a missing tick.

The same handful of gaps account for most of the changeover records that don't hold up when someone actually checks them against the line.

A packing line reported a 22-minute average changeover for months, timed from the moment the line stopped to the moment it restarted. Correcting the clock to Last Good Piece and First Good Piece, including four minutes of adjustment and an unrecorded trial run, put the real figure at 41 minutes, almost double.

Once the Learning section was actually used instead of ticked through, two steps that had always been done with the line stopped, staging the next reel and resetting the guarding, were moved into Preparation and done while the line was still running. The next ten changeovers averaged 33 minutes, a real reduction the old timing method would never have shown was needed.

The form is the easy part. Keeping it current, routing it to the right owner and holding the evidence together is the work that actually slips.

KnowOps

Runs the Production Control programme this record sits in, links it to Line Clearance and the Downtime Log, and keeps the changeover register reportable across every line.

KnowMaintain

Owns the tooling and equipment history behind Settings Changed To Standard Values and Tooling Change Could Be Simplified, so a changeover finding can become a maintenance job without re-keying anything.

KnowQuality

Picks up where changeover overlaps allergen or label control, since the Allergen Changeover Check and Label Verification Record both sit next to this one in Production Control.

Ella

Watches Result Band and Improvement Raised across every changeover, flags the ones running over Target Minutes, and holds any write to this record for your approval first.

SMED

Single-Minute Exchange of Die. A method for cutting changeover time by separating internal work, only possible while stopped, from external work, done while running, then shrinking what remains internal.

Last good piece / first good piece

The two timestamps that bound a changeover for measurement: the final conforming unit of the outgoing product, and the first conforming unit of the incoming one.

Internal vs external work

Internal work can only happen while the line is stopped; external work can be done before or after. Moving steps from internal to external is the main lever for shortening a changeover.

Result Band

The Pass, Caution or Fail banding this record calculates from its scored fields, used to flag a changeover for review without reading every field.

Recoverable loss

Time lost to changeover that is within the site's own control to reduce, as distinct from loss caused by equipment breakdown or external supply issues.