I have discovered a bug with the What If parameter.
Link: https://docs.microsoft.com/en-us/power-bi/desktop-what-if
Use Case: Calculating how much cost is tied to computer memory. We want to understand how increases or decreases of memory cost affect our bottom line. This will eventually expand to software, storage, and other costs.
Data: We generate a list of servers with the amount of memory installed. We list the computer name, the amount of memory (GB), and we know the cost per GB (current default is $6.24 USD).
What If Measures / Series: We format the series using 'Fixed Decimal Point' or 'Decimal', and format the measure using 'Decimal' (which is automatically generated, and we cannot change it).
Observations: In this use case, using either Fixed Decimal or regular Decimal, we've observed that what we type into the field is not what happens in the measure. If the new measure value is above 6.24; it appears to incrementally increase at 0.05, rather than give us the actual result. Therefore, the resulting visualization is incorrect. When the new value is entered, it behaves as if it is a float, rather than a decimal or fixed decimal. Even with a shortened range (0.00 to 15.00, incrementing by 0.01), we still encounter problems.
