The two use cases that are best solved using Calculation Procedures & Matrices are: To apply the correct factor when determining a cost and To return output that is calculated differently based on the date. A Calculation Procedure is a tool that can perform complex calculations based on multiple input and output variables. A Calculation Matrix is a tool that can perform complex calculations based on multiple input variables and output values within groups. The consultant can use Calculation Procedures & Matrices to solve these use cases, because they involve applying rules and formulas to different data values and scenarios