Functions that apply a stepped (changing level) rate of payment to a timeperiod.
Component | What the name means |
TStep | Stepped rate using a series of 'to' dates and rates.
| TStepGrow | Project a stepped continuous rate up to a series of dates where the rates are derived from an initial rate with growth applied
| TStepGrowX | Stepped Rate with Growth applied
| TStepThenGrow | Stepped Rate using ToDates then constantly Grow after that
| TStepFcst | Project a stepped continuous rate up to a series of dates where the rates are read off a supplied forecast
| TStepGrown | TStep that is grown according to growth rates
| TStepSF | TStep incorporating a Finish date as well as a Start date
| TStepS | The same as TStep but with the Seasonality facility
| TStepCombine | Combines up to 4 streams of annual rates and calculates the amount due in the period.
| MultiTStep | TBA
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The Stepped Rate To family is about applying a stepped rate of payment whose level is changing, to a timeperiod, ie working out how much is paid in that timeperiod, where the dates are the DATES UP UNTIL which each rate applies.
The basic function is TStep. It takes a range of AnnualRates and ToDates and applies them to the timeperiod. Other functions in the family differ as follows:
- Adding the Fcst feature creates another function, TStepFcst. This function still requires a list of ToDates does not require a list of AnnualRates, because these are read off a forecast.
- Adding the Grow feature gives rise to another function, TStepGrow. This function, as with the Fcst ones above, requires a list of ToDates but not AnnualRates, because these are determined from an InitialAnnRate, to which is applied one or more percentages from the GrowthRates.
- Adding the Grow feature in a more versatile way, and applying it to the AnnualRates, gives TStepGrowX, one of the newer functions in this family.
- TStepCombine is a versatile function that is capable of doing several TSteps and adding the results (rather like a Multi function), but it goes a stage further and can multiply the results together, take the maximum, minimum etc, a bit like the Stepped Rate Revenue functions.
- All the functions in the Stepped Rate To family have clearly defined annual rates that apply to each step, or they mandatorily have to take annual rates from a forecast. For stepped rate functions either have a pre-defined annual stepped rate or have a default annual rate that comes from a forecast of annual rates, see the Stepped Rate Market family.
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