MES, MOM & Shop-Floor Data Systems worked example

Downtime Code Accuracy at 29% investigation and correction allowance: a worked example

Push investigation and correction allowance up to 29% and the picture changes. This example computes every intermediate figure at that operating point. Use when planning weekly downtime data audits. Helps schedule analyst time for verifying and correcting reason codes so your Pareto charts and improvement priorities reflect real failure patterns.

The inputs for this scenario

  • Downtime events to audit per week: 85 events / wk (unchanged)
  • Events reviewed per minute: 1.5 events / min (unchanged)
  • Investigation and correction allowance: 29 % (raised for this scenario; the documented default is 25)

Working through the calculation

  • Applying the documented formula (Base audit time = events to audit / events reviewed per minute) to the inputs above produces each figure below.
  • At this operating point the engine returns 73.1 hr for total weekly audit time, the number this scenario is built around.
  • At this operating point the engine returns 56.67 hr for base audit review time.
  • At this operating point the engine returns 29 % for investigation and correction allowance.
  • At this operating point the engine returns 1.5 pieces / min for audit review rate.

How this compares with the baseline

  • Against the tool's baseline example, where investigation and correction allowance sits at 25% and the headline result is 70.83 hr, this scenario comes in 3.2% above the baseline at 73.1 hr.
  • It computes total weekly downtime-code audit time as base review time inflated by an investigation-and-correction allowance. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Total weekly audit time: 73.1 hr (headline result)
  • Base audit review time: 56.67 hr
  • Investigation and correction allowance: 29 %
  • Audit review rate: 1.5 pieces / min

Run it with your numbers

  • Every input above is editable in the live Downtime Code Accuracy calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.