Almost no firm can state how many inquiries became attended consultations
Before anything is tested, the stage counts have to exist, and in most offices they do not.
The real funnel has more steps than a form fill and a signature. Inquiry received, contact made, consultation booked, consultation attended, fee quoted, matter signed, first payment collected.
Each step leaks at a different rate. A firm losing a third between booked and attended has a scheduling problem. A firm losing them between quoted and signed has a fee conversation problem. Fixing the wrong one is a wasted quarter.
Counting is a discipline problem rather than a software problem. A shared sheet filled in daily by whoever answers the phone beats a case management system nobody updates.
Run it for six weeks before changing anything. The leak is almost always somewhere the partners did not suspect, and six weeks of honest counting is cheaper than any redesign.