STEM help / Calculation framework

10.3.34.9 Time Lag Transformation

This allows you to model demand which depends on something which has happened in an earlier year, based on a single Input and an integer Lag input, which represents the number of years delay. The Output in year n, zn, is calculated as:

where

x = Transformation Input

c = Lag input.

The optional Costs input is used to avoid circular cost-allocation, just as it is for the Previous transformation.

As an example, you might use a Time Lag Transformation to model the installation of a secondary maintenance-upgrade Resource, a few years after the installation of a primary Resource. Take the first Resource as the Transformation Input, on the Basis of Incremental Units, specify the desired Lag, in years, and then define a Transformation Resource Requirement for the secondary Resource.

 

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