Shift Task Sampling Gap Tool

Description

Sum required task durations and corresponding sampled durations, and return unsampledRequiredDuration as their difference.

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.

Sum required task durations and corresponding sampled durations, and return unsampledRequiredDuration as their difference.

When to use this tool

Use Shift Task Sampling Gap 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 taskDurations, sampledDurations, taskRequired. Keep parallel arrays aligned. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read requiredDuration, sampledRequiredDuration, unsampledRequiredDuration. Use the output convention below.

Require aligned taskDurations, sampledDurations, and taskRequired flags with 0<=sampledDuration<=taskDuration per row. Sum required task durations and corresponding sampled durations, and return unsampledRequiredDuration as their difference.^[1]

Input field	Meaning and units	Accepted input
taskDurations	Task Durations	Required. Array of finite number; maximum items 256.
sampledDurations	Sampled Durations	Required. Array of finite number; maximum items 256.
taskRequired	Task Required	Required. Array of boolean; maximum items 256.

Output field	Interpretation	Returned shape
requiredDuration	Required Duration	Required. Finite number.
sampledRequiredDuration	Sampled Required Duration	Required. Finite number.
unsampledRequiredDuration	Unsampled Required Duration	Required. Finite number.

json

{
  "input": {
    "taskDurations": [
      5,
      5,
      10
    ],
    "sampledDurations": [
      2,
      4,
      0
    ],
    "taskRequired": [
      true,
      true,
      false
    ]
  },
  "output": {
    "requiredDuration": 10,
    "sampledRequiredDuration": 6,
    "unsampledRequiredDuration": 4
  }
}

Limitations and assumptions

Durations need one unit and tasks are assumed correctly segmented without double counting. Coverage does not establish sample representativeness, measurement quality, actual exposure, or safe working conditions.
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

Calculation and input contract: occupational-health/shift-task-sampling-gap — tool.io

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