Bill amount and usable roof
These two fields decide whether a project exists. The monthly bill sets system size and payback; the shadow-free area decides whether that system fits. An enquiry with a strong bill and a shaded twenty foot terrace is not a lead, it is a polite conversation, and it is better to know that before a surveyor is dispatched.
Who controls the roof
Ownership determines the path. An independent house owner decides alone. A tenant needs a landlord who gains nothing from the investment. An apartment resident needs a society resolution and often a general body vote. The technical enquiry may look identical in all three cases while the probability of an installation differs enormously.
How far the paperwork has moved
Once a survey has been attended, a proposal accepted and a discom application submitted, the customer has invested effort that browsers never invest. Tracking those as stages rather than notes gives the score real behavioural signal and gives your team an accurate view of which projects are genuinely in the pipeline.