Industrial engineering calculator
Calculate Overall Equipment Effectiveness (OEE) from planned time, downtime, ideal cycle time, total count and good count, with availability, performance and quality shown separately.
OEE
71.2%
Work on the lowest of the three factors first. It shows where most of the lost time sits.
OEE = Availability × Performance × Quality
| Symbol | Meaning | Unit |
|---|---|---|
| A | Run time / planned production time | - |
| P | (Ideal cycle time × total count) / run time | - |
| Q | Good count / total count | - |
See OEE in garment manufacturing for how to collect the data.
Defaults: 480 minutes planned, 48 minutes downtime, ideal cycle 30 seconds, 720 pieces made, 684 good.
Look at the lowest factor first. Here performance is lowest, which points to slow running and small stops rather than breakdowns. Track OEE on the same machine over time rather than comparing very different machines.
The fastest cycle time the machine can sustain for the product, from the machine specification or best demonstrated rate. A slow ideal cycle time makes performance look better than it is.
OEE fits machine-paced processes best: knitting, automatic sewing units, cutting and embroidery machines. For manual lines, line efficiency is the usual measure.
Overall Equipment Effectiveness (OEE) splits losses into availability, performance and quality. How to calculate it for sewing, cutting and knitting machines, a worked example, and why OEE and line efficiency tell you different things.
Line efficiency compares the minutes a sewing line earned with the minutes it had. Learn the formula, work through examples, understand what drives efficiency up and down, and avoid the reporting mistakes that make the number meaningless.
When a sewing line runs well below its planned efficiency, the cause is usually in a few places: the SMV, the balance, lost time, quality or people. A structured way to check each one and fix the biggest losses first.
Lean means removing work that adds no value and making production flow. The eight wastes as they appear in cutting and sewing, the lean tools that work in garment factories, and a realistic order to start.