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Today’s OnLine Analytical Processing (OLAP) or multi-dimensional databases have limited support for whatif or sensitivity analysis. What-if analysis is the analysis of how the variation in the output of a mathematical model can be assigned to different sources of variation in the model’s input. This functionality would give the OLAP analyst the possibility to play with “What if ...?”-questions in an OLAP cube. For example, with questions of the form: “What happens to an aggregated value in the dimension hierarchy if I change the value of this data cell by so much?” These types of questions are, for example, important for managers that want to analyse the effect of changes in sales on a product’s profitability in an OLAP supermarket sales cube. In this paper, we extend the functionality of the OLAP database with what-if analysis.

WHAT-IF ANALYSIS IN OLAP - With a Case Study in Supermarket Sales Data