WIP Tracking Software: Stop Overwriting Shift Updates

WIP tracking software should preserve accepted production updates when another person saves an older screen. A supervisor correcting yesterday's entry must not erase work the operator recorded a moment ago. Test both actions together before trusting the shift totals.

This guide is for small manufacturing teams evaluating shared shop-floor records, with US buyers in mind and the same test applicable to factories in India and elsewhere. It extends our main WIP tracking guide with a two-user correction example. The question is whether the software keeps each person's intended change without silently replacing newer information.

Define what the quantity field means

Before opening two devices, distinguish a new production event from a correction to an earlier event. Reporting 15 additional pieces is different from changing an earlier report from 20 to 18. A cumulative total is a third thing: it summarizes the accepted events. If the same box accepts all three meanings without making the action explicit, users can submit different intentions through identical-looking screens.

Ask the supplier which record is being changed. Is an operator adding a completion event, replacing a cumulative counter, or correcting one identifiable earlier entry? Show the job, operation, unit, event reference, and accepted time alongside the action. The user should not need to infer the meaning from the current number alone.

For a multi-user technical example, Microsoft's Dataverse concurrency documentation describes detecting whether a record changed after an application read it. Such a check can help identify an outdated update; it does not decide the correct manufacturing quantity or automatically merge two business actions.

Open the same job on two devices

Hypothetical acceptance test: job J-80 contains 80 pieces at one operation. There are no transfers, scrap, rework, or new starting pieces during the test. The first accepted completion event, E-1, reports 20 pieces. The operation summary therefore shows 20 completed and 60 remaining. These are fictional records, not customer results.

Completed here means completed at this operation. It does not mean accepted finished goods or permission to ship. For the broader distinction between operation activity and physical quantities, see the partial-job quantity guide.

1. Operator A and supervisor B both open the summary showing 20 completed. For illustration, call that saved record version 7.
2. A reports 15 additional pieces as a new event, E-2. Assume those pieces do not overlap E-1. After acceptance, the summary is 35 completed and 45 remaining. Call this version 8.
3. B still has the old screen. B discovers that E-1 should have reported 18 pieces and attempts a correction.
4. The software must not save the old screen's revised cumulative value of 18 over the current total of 35. That would discard E-2's 15 pieces from the summary.
5. Resolve the correction against E-1 while preserving E-2. The reviewed result is 18 plus 15: 33 completed and 47 remaining.

The pass condition is that both accepted facts remain explainable: E-1 was corrected by two pieces, and E-2 still records 15 additional pieces. A screen that merely shows a plausible total is insufficient. Open the underlying entries and show how 33 was obtained.

Make an outdated update actionable

A useful conflict message identifies the affected record, explains that newer information exists, and preserves the user's unsaved intention for review. B should be able to compare the current accepted events with the proposed E-1 correction. Losing the typed explanation and returning to a blank form makes careful correction unnecessarily difficult.

There can be more than one acceptable design. A summary-based edit may reject the outdated save and require a review against the latest record. An event-based design may apply a properly scoped E-1 correction and recalculate the summary while preserving E-2. Test the observed result rather than requiring every supplier to implement the same database mechanism.

Do not resolve the demonstration by giving B a force-overwrite button that simply replaces 35 with 18. Likewise, automatically adding the two displayed totals would be wrong: 35 and 18 are not two independent completion events. The system needs the meaning and scope of the change, not just an arithmetic rule.

Keep the correction and its evidence

Retain E-1's original value, corrected value, reason, person, and approval or acceptance time according to the agreed workflow. Preserve the link to the source traveler or other supporting record where appropriate. A correction should not make it appear that the original 20-piece report never existed.

Separate the time work occurred from the time an update was accepted. A late correction can affect a previously reported shift while the system accepted it today. Reports should identify their cutoff and treatment of late changes. The output-total reconciliation guide covers those reporting boundaries.

Give normal reporting and correction different permissions when the process requires them. Operators need an efficient way to record work; reviewers need enough context to authorize a correction. Shared administrator accounts would make it harder to establish who performed each action. Test the workflow with the actual roles proposed for the pilot.

If accepted WIP events feed inventory, define which event creates a stock movement and how its correction is linked. Changing a cumulative display must not create a second receipt for the same output. The main inventory guide explains the movement and status boundary; no stock transfers occur in this demonstration.

Separate a stale save from a repeated submission

Now repeat A's E-2 submission after simulating an uncertain response in the test environment. A should be able to establish whether that same event was accepted before sending it again. The expected account still contains one 15-piece E-2 event, not two copies.

This is different from B's outdated correction. A repeated event concerns whether one business action was recorded twice. A stale save concerns whether an old view overwrites newer accepted data. Passing one test does not establish the other. Ask the supplier to demonstrate them separately, then combine them in the same job.

Also try two genuinely separate production reports with the same quantity. They may be legitimate distinct events. Do not automatically merge every matching number. Record enough identity and context for the system or reviewer to distinguish a retry from a second physical completion.

Bring an older offline entry back into the test

If offline recording is part of the proposed scope, leave B's device disconnected while A's update is accepted. Reconnect it later and inspect what happens to the pending correction. A recent upload time must not make the old summary authoritative.

Show pending, accepted, rejected, and review-required entries clearly. Staff should be able to find an unresolved conflict at shift handover, with its owner and next action. The current screen should not silently show a local pending quantity as though the shared system already accepted it.

Then read the job from a third session or exported report. Confirm that its accepted-event account matches the reviewed result and that unresolved drafts are distinguishable. Two screens agreeing because they share an old cached value is not proof that the current records are correct.

Use these checks before accepting the workflow

• Meaning: new completion, earlier-event correction, and cumulative summary are distinguishable.
• Two-user result: A's 15-piece event survives B's correction of E-1 from 20 to 18.
• Balance: the reviewed summary is 33 completed and 47 remaining out of 80.
• History: both original and corrected E-1 values remain attributable, with E-2 unchanged.
• Retry: submitting E-2 again does not create another accepted copy of that event.
• Offline review: an older queued update cannot silently overwrite the accepted account.
• Handover: the next supervisor can identify accepted results, unresolved conflicts, and the responsible person.

These are proposed software acceptance requirements, not claims about features already included in Ploqy or every WIP tracking system. Save the expected and observed results from a controlled demonstration. Bring the failed step to the scope discussion so that interface behavior, record rules, and review responsibilities can be agreed together.