Abstract
In estimating annual construction budgets and work forces required for a large entity, such as an operating company, it is desirable to know the total annual number of cable pairs to be added at the main frames in all of the feeder routes in the entity. These pairs are the result of many independent relief decisions made in the individual feeder routes. A model is presented which relates the total annual number of cable pairs added at the main frames to aggregate relief timing and sizing design parameters, an aggregate demand forecast and the total assigned and available pairs at the main frames in all of the routes in the entity. Because the model does not require individual route data or specific relief projects, it can be used as a “top-down” check on the “bottom-up” requirements determined by aggregating a list of identified relief projects. It is also useful for estimating cable pair requirements when specific relief projects are not yet identified.
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