When creating a module, consider the scope of the calculation and only include the dimensions that are needed. If the formula doesn't return the value required, or errors, don't keep adding dimensions until it does; it is better to review the calculation itself. Check other modules; you may already have a calculation module with the relevant dimensions, so add the calculation in the existing module
Related to Rule:
2-01-04 Use the D-I-S-C-O Methodology for Module Design
Best Practice Article:
Reduce Calculations for Better Performance
Questions on this topic? See 2.01-20 Use Appropriate Dimensions for modules in our Planual forum.