Description
Calculate an actual-shift concentration average and a separate fixed-reference-hours exposure contribution.
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.
Calculate an actual-shift concentration average and a separate fixed-reference-hours exposure contribution.
When to use this tool
Use Work Shift Overtime Exposure Denominator 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 regularHours, overtimeHours, regularConcentration, overtimeConcentration, referenceHours. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read actualHours, actualAverage, referenceContribution. Use the output convention below.
Require nonnegative regularHours and overtimeHours with positive sum and nonnegative corresponding concentrations, plus positive referenceHours. Return actualHours, actualAverage=sum(hours*concentration)/actualHours, and referenceContribution=sum(hours*concentration)/referenceHours.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| regularHours | Regular Hours | Required. Finite number; minimum 0. |
| overtimeHours | Overtime Hours | Required. Finite number; minimum 0. |
| regularConcentration | Regular Concentration | Required. Finite number; minimum 0. |
| overtimeConcentration | Overtime Concentration | Required. Finite number; minimum 0. |
| referenceHours | Reference Hours | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| actualHours | Actual Hours | Required. Finite number. |
| actualAverage | Concentration-time sum divided by actual total hours. | Required. Finite number. |
| referenceContribution | Same sum divided by supplied referenceHours. | Required. Finite number. |
{
"input": {
"regularHours": 8,
"overtimeHours": 2,
"regularConcentration": 2,
"overtimeConcentration": 4,
"referenceHours": 8
},
"output": {
"actualHours": 10,
"actualAverage": 2.4,
"referenceContribution": 3
}
}Limitations and assumptions
- Concentrations need one unit. Actual average and fixed-reference contribution use different denominators; the tool does not choose an occupational limit, adjust a permitted exposure, or establish regulatory compliance or safe overtime.
- 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
- Exposure Time Weighted One Task Term
For positive shiftHours, taskHours within zero through shiftHours, and nonnegative concentration and background return taskContribution=concentration*taskHours/shiftHours, backgroundContribution=background*(shiftHours-taskHours)/shiftHours, and their sum as weightedMean.
- Task Exposure Duration Weight
Return one supplied research duration-weighted exposure term; no occupational limit or compliance determination.