OEE & Downtime Cost Estimator
Put in a few numbers off your run logs and production reports, and this breaks a line's shift into the three pieces of Overall Equipment Effectiveness (OEE) — how much of the scheduled time you ran, how fast you ran when running, and how much of what you made was good. If you add a value per unit, it splits the yearly loss between time you stood still and time you ran slow. Every formula is shown, and nothing leaves your browser.
Your numbers
Hours the line was scheduled and staffed to run in this period, before any downtime. Leave out planned no-run time (unstaffed shifts, planned maintenance windows you never intended to run).
Hours lost inside that planned time to stops you did not intend: faults, jams, waiting on feed or trucks, changeovers that ran long, nuisance trips. Total the minutes and divide by 60.
The fastest sustainable rate the line is designed for, from the equipment plate or a proven best run. If this is set too low, Performance will read over 100% — the tool flags that below.
Everything the line put out this period, good and bad, in the same unit as the ideal rate. Use a recently calibrated scale or counter.
Just the sellable output that passed the first time, before rework or scrap. Leave blank if you do not track it — the tool treats Quality as 100% and says so.
Leave blank unless you want a rough dollar figure. Use contribution margin or price per unit — whatever a lost unit really costs you. Used only for an illustrative estimate.
How many periods like this one you run in a year. If the numbers above are one shift and you run ~250 production days, put 250. If they are a week, put ~50.