Description
Calculate first-pass yield from supplied entered and unreworked-good counts.
Production quantities distinguish planned time, operating time, setup, cycle time, demand, first-pass good units and accepted rework. A local availability term is not complete OEE, and equal time-per-unit arithmetic is not measured capacity. Counts and durations must share one nonoverlapping accounting scope.
Calculate first-pass yield from supplied entered and unreworked-good counts.
When to use this tool
Use Process First Pass Yield Factor when you already have enteredUnits, passedWithoutRework and need to calculate first-pass yield from supplied entered and unreworked-good counts.
How to use the tool and how it works
- Enter enteredUnits, passedWithoutRework. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read firstPassYield, firstPassFailures, defined. Inspect defined before interpreting the associated values.
Require safe whole entered>=0 and passedWithoutRework in [0,entered]; return passed/entered, or zero with defined=false for zero entered, plus entered-passed failures.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| enteredUnits | Entered Units | Required. Safe integer; minimum 0. |
| passedWithoutRework | Passed Without Rework | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| firstPassYield | First Pass Yield | Required. Finite number. |
| firstPassFailures | First Pass Failures | Required. Safe integer. |
| defined | False for zero enteredUnits, with firstPassYield=0 placeholder; this is not measured zero yield. | Required. Boolean. |
{
"input": {
"enteredUnits": 100,
"passedWithoutRework": 92
},
"output": {
"firstPassYield": 0.92,
"firstPassFailures": 8,
"defined": true
}
}Limitations and assumptions
- The zero-input yield is undefined rather than a measured zero. No quality inspection, rework policy or process performance is independently established.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Review the full time study, production ledger and process definition before interpreting performance. Use a complete capacity, OEE or workflow analysis when bottlenecks, quality, concurrency and operating constraints matter beyond one local term.
References
Similar or alternative tools
- Production Rework Good Unit Credit Term
Combine first-pass good units with accepted reworked units.
- Production OEE Availability Term
Calculate an availability term from planned production time and downtime.