A good RFP will structure criteria into a hierarchy of sections / subsections and questions. This allows for the most accurate allocation of weights and priorities. However, calculations for vendors' weighted score totals can quickly become fragile, especially when managed in a spreadsheet (it's hard to represent hierarchical structures in a 2D spreadsheet).
PostRFP takes care of all these calculations, and provides easy ways to switch views between different weighting sets and scoring sets in the RFP.
PostRFP's scoring and analysis framework is based on the concept of Weighted Attribute Analysis.