NIOSH Composite Lifting Index CLI Calculator
Ordered RNLE multitask CLI=STLI1+sumFILIi(1/FM new−1/FM prior); caller independently computes appropriate combined-frequency tables/ranking, not sum of single indices. Caller independently establishes matching units, evidence, method edition and applicability; output is not compliance, diagnosis, work-safety approval, geological identity or validated hazard prediction.
Description
A composite lifting index combines demands across an ordered set of lifting tasks.
Task ordering and frequency multipliers need independent assessment before the incremental terms are combined. Use this tool to calculate NIOSH Composite Lifting Index CLI from the supplied measurements and assumptions.
When to use NIOSH Composite Lifting Index CLI Calculator
Use this tool to calculate NIOSH Composite Lifting Index CLI from the supplied measurements and assumptions. Establish the observation protocol, units, task and reference population or review criterion before entering measurements.
How to use NIOSH Composite Lifting Index CLI Calculator and understand its results
- Establish the observation protocol, units, task and reference population or review criterion before entering measurements.
- Enter callerOrderedSingleTaskIndices, callerOrderedFrequencyIndependentIndices, callerPriorCumulativeFrequencyMultipliers, callerNewCumulativeFrequencyMultipliers, using the field meanings and rules below, then run the tool.
- Read compositeLiftingIndex. Interpret the fields using their units, signs and evidence conventions below.
- If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerOrderedSingleTaskIndices | Caller ordered single task indices | list of number | Required |
| callerOrderedFrequencyIndependentIndices | Caller ordered frequency independent indices | list of number | Required |
| callerPriorCumulativeFrequencyMultipliers | Caller prior cumulative frequency multipliers | list of number | Required |
| callerNewCumulativeFrequencyMultipliers | Caller new cumulative frequency multipliers | list of number | Required |
Enter 1–128 aligned nonnegative single-task lifting indices already sorted in descending order, nonnegative frequency-independent indices and positive prior/new multipliers≤1 with new≤prior. Start with the first single-task index and add FILI_i×(1/newFM_i−1/priorFM_i) for later tasks. Ties are allowed; the first pair of frequency multipliers is validated but contributes no incremental term. No ordering or frequency-table derivation is performed.
CLI=STLI_0+Σ_(i=1..n−1)FILI_i×(1/newFM_i−1/priorFM_i) Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| compositeLiftingIndex | Composite Lifting Index; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"callerOrderedSingleTaskIndices": [
2,
1
],
"callerOrderedFrequencyIndependentIndices": [
1,
0.5
],
"callerPriorCumulativeFrequencyMultipliers": [
1,
1
],
"callerNewCumulativeFrequencyMultipliers": [
1,
0.5
]
},
"output": {
"compositeLiftingIndex": 2.5
}
}Limitations and assumptions
Task ordering and frequency multipliers need independent assessment before the incremental terms are combined. Interpretation depends on the units, sampling scope and exact model described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.
Alternative or Complementary methods
Use NIOSH Lifting Index LI Calculator for this related task: A lifting index divides actual load by a recommended weight limit on the same mass basis.
Use NIOSH RWL Load Constant Base Calculator when its separate inputs and assumptions fit the question: The Revised NIOSH Lifting Equation multiplies a load constant by six task multipliers.
References
Similar or alternative tools
- NIOSH Lifting Index LI Calculator
A lifting index divides actual load by a recommended weight limit on the same mass basis.
- NIOSH RWL Load Constant Base Calculator
The Revised NIOSH Lifting Equation multiplies a load constant by six task multipliers.