What are the two most important kinds of criteria that analysts should consider when they specify physical output requirements? Why are they important?

I know the important criteria are type and purpose of the output and the operational,technical, and economic feasibility.

This is a systems analysis and design method question. I have already seen the posted textbook answer to this question provided by Chegg so please do not just copy and past their response. I am a bit confused on what makes these criteria so important and would like an explanation that allows me to see a different perspecitve. TIA