Description
Compare explicit support with a supplied linear phase-in interval, without policy eligibility advice.
A policy scenario makes eligibility bases, rates, thresholds, periods, and costs explicit. A calculated share or balance follows those assumptions. It does not select the governing policy or establish what caused an observed program outcome.
Compare explicit support with a supplied linear phase-in interval, without policy eligibility advice.
When to use this tool
Use it for phase in threshold support gap when the required inputs and conventions are already available.
How to use the tool and how it works
- Enter value, phaseStart, phaseEnd, observedSupportFraction. Use the stated units and boundary conventions.
- Run the calculation. Correct any input error before interpreting a result.
- Read modelSupportFraction, residual. Inspect any known, defined, inclusion, or boundary flags before interpreting numeric values.
Require phaseEnd>phaseStart and observedSupportFraction within zero through one. Set modelSupportFraction to zero below the start, one above the end, and linear interpolation between; return residual=observed-model.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| value | Value | Required. Finite number. |
| phaseStart | Phase Start | Required. Finite number. |
| phaseEnd | Phase End | Required. Finite number. |
| observedSupportFraction | Observed Support Fraction | Required. Finite number; minimum 0; maximum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| modelSupportFraction | Model Support Fraction | Required. Finite number. |
| residual | Residual | Required. Finite number. |
{
"input": {
"value": 15,
"phaseStart": 10,
"phaseEnd": 20,
"observedSupportFraction": 0.6
},
"output": {
"modelSupportFraction": 0.5,
"residual": 0.09999999999999998
}
}Limitations and assumptions
- This compares a supplied observation with an explicitly linear phase-in model. It does not estimate support from data or establish the correct policy model.
- The field tables describe structural bounds; the mechanics also state cross-field requirements. Malformed input shapes, disallowed keys, and invalid domains cause input errors. Results must remain finite and within the declared output contract. A successful false flag or zero placeholder is distinct from an error.
- Numeric arithmetic uses binary floating point. Exact comparisons have no hidden tolerance or decimal rounding; negative zero is exported as zero. Decimal-text integer operations retain the exactness specifically stated above.
Alternative or Complementary methods
For phase in threshold support gap, check the source records and the supplied rule before comparing the result with another method. Consult the applicable authoritative rule when deciding eligibility, legal timing, fees, or obligations.
References
Similar or alternative tools
- Policy Rate Phase In Year Fraction
General rate proration over supplied half-open day-index bounds, without selecting statutory rules.
- Threshold Cliff Discontinuity
Evaluate a caller-defined step policy and its one-sided jump without selecting eligibility or legal rules.