A feasibility study tells you whether a site can be serviced before you commit to it. It is front-end due diligence, not a submission document.
The study identifies where the connections would come from. It checks whether the existing infrastructure has room for what you intend to build.
It also flags the approval risks attached to the site. That includes regulated areas, drainage constraints, and known downstream limitations.
The output is a clear read on cost and risk. You learn what servicing the site would require, and which of those requirements are expensive.
This work is most valuable during an acquisition window. It is far cheaper to find a servicing constraint before closing than after.
Where the constraint turns out to be downstream capacity, the analysis extends into a full trunk capacity study. Once you proceed, the same groundwork carries into the Functional Servicing Report.
For more on assessing development sites early, read Engineering Due Diligence Before Buying Development Land .