How can I determine the system requirements for an application?

[UkiwiS]

It's nice to have software that can compare and score system components to other samples but I'm trying to do something a little different.

I am trying to determine the system requirements for an application that runs on Windows 10 IOT Enterprise. I know it will run on virtually any platform and I know it probably works better with more RAM and more hard drive space but how can I quantify that to determine the minimum requirements?

Has anyone else approached this problem? What did you do or what would you recommend I do to approach this problem?

Thanks in advance,.
KIWI

[David (PassMark)]

You do some testing is the answer.

Run all the most common functions in the App while checking task manager for RAM usage.
Check the install folder to calculate disk usage (very unlilkey it will run better with more free disk space).
Measure the time to complete certain tasks on various PCs and then make a subjective decision about what level of performance is acceptable to the average user. Then you know the CPU / disk speed requirements.