Leads is the single number most likely to hide the actual problem
A count of inquiries tells you nothing about whether the business converted any of them, and it moves for reasons that have nothing to do with performance.
Between an inquiry and money there are several distinct conversions: answered, qualified, scheduled, arrived, quoted, sold, installed, collected. Each one has its own rate, and a business can be excellent at some and poor at others while the lead total looks fine.
The failure this hides is common enough to be worth naming. Marketing increases inquiries, the office cannot absorb them, answer rate drops, and total booked jobs stay flat or fall. The report says leads are up. The board says nothing changed. Both are true.
Writing the chain down is usually the whole first project. Not modeling it, just counting it honestly for a month: how many rang, how many were answered, how many got on the schedule, how many got a quote, how many said yes.
The step with the worst rate is rarely the one anybody expected, and it is usually not on the website. It is often a stretch of the day when nobody is on the phone, or a category of job the office quietly declines, or a quote that never got a second call.
Once the chain is counted, most decisions get easier. You stop debating a headline when you can see that a quarter of calls in the busiest hours are not being answered.