Best methods for inputting a set a data from the user?

Hi StephenF ,

This depends on the way you want the values inputed impact your final result.

If you are talking about having the monthly values set only once then the option can be to have a excel, csv, txt, file or a sharepoint list with that information where the user in puts the data and that final then you read your data from that input.

If you want to have something similar to a simulation purpose where users can select some values and get the result you can setup some what if analisys.

The Power apps is also a good option to have the input and get the result back, so there is a different number of possibilities but this depends on what is the process you want to have this working, online, offline.

Just keep in mind that Power BI is not an input software as Excel it works on different way so the approach must be different.