Design Guide

Hello Gurus.

I am working in a Proof of Concept for a forecasting process. This is not a financial process it is a Logistic one.

The requirement is to allow users to load forecast at different level of a product hierarchy. My question is regarding to know some direction on getting this.

For example if we desire to input data at three different levels, should we create three different applications and the run some consolidation process?

Do you know if there is some design doc out there to read?

Thanks

Sergio