What is this all about?
If you are planning something n e w ...
... You need to invest work into the realization of your idea in the beginning. You are also facing the question how to measure the impact of your idea in a reasonable way. Further you want to quantify the effects in detail.
Later on demand for adaptions arises. External influences or changed targets require modifications to control variables and loops. Finally, what developed from your original idea requires a critical revision - a plan-revision.
Further information is available by personal consultation and login to this website.
Many small stages leading our steps ahead.