Description
Remove supplied duplicate task minutes without assessing exposure safety.
Occupational exposure calculations combine measured quantities, duration, reference conditions, weighting, and sampling support. Linear concentrations, squared acceleration, and logarithmic sound levels require different arithmetic. A supplied reference or limit is not automatically the applicable standard, and a local calculation is separate from a full exposure and safety assessment.
Remove supplied duplicate task minutes without assessing exposure safety.
When to use this tool
Use Exposure Task Double Count Minute when you need this particular sampling, duration, reference-unit, physical-exposure, or reporting-base term.
How to use the tool and how it works
- Enter firstMinutes, secondMinutes, sharedMinutes. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read uniqueMinutes, naiveMinutes, overlapFraction. Use the output convention below.
For nonnegative firstMinutes, secondMinutes, and sharedMinutes<=min(first,second) return uniqueMinutes=first+second-shared, naiveMinutes=first+second, and overlapFraction=shared/naive when positive, otherwise zero.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| firstMinutes | First Minutes | Required. Finite number; minimum 0. |
| secondMinutes | Second Minutes | Required. Finite number; minimum 0. |
| sharedMinutes | Shared Minutes | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| uniqueMinutes | Unique Minutes | Required. Finite number. |
| naiveMinutes | Naive Minutes | Required. Finite number. |
| overlapFraction | Shared minutes divided by the naive sum, with zero on a zero sum. | Required. Finite number. |
{
"input": {
"firstMinutes": 30,
"secondMinutes": 40,
"sharedMinutes": 10
},
"output": {
"uniqueMinutes": 60,
"naiveMinutes": 70,
"overlapFraction": 0.14285714285714285
}
}Limitations and assumptions
- The overlap fraction uses the naive sum rather than unique duration. A zero denominator uses a zero convention without a separate flag; actual intervals, simultaneous hazards, exposure magnitude, and compliance are not checked.
- 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
Use a complete hazard-specific assessment with calibrated measurements and the appropriate exposure model. Verify reference conditions, sampling coverage, weighting, denominator, and the applicable professional or regulatory method.
References
Similar or alternative tools
- Occupation Diary Double Task Credit
Allocate supplied simultaneous diary time equally or to the first task under an explicit policy.
- Nursing Handoff Double Entry Minute Flag
Audit administrative handoff entry durations under an explicit duplicate-credit policy.