The arithmetic that says how many salespeople, calling how often, can cover which accounts at what cost, and where the gap between capacity and demand sits.
Capacity = reps × calls per week × working weeks, less ramp Demand = Σ accounts × required frequency by tier
The plan is where they meet. The gap is expressed in reps: "the South is 1.6 reps short at the current frequency".
Headcount, calls per week, account tiers and their frequencies, and cost per rep. A scenario moves one and recomputes the rest.
Each scenario lands on a cost finance can put in the plan. That is what makes it a plan rather than a wish.
Touches owed across all accounts, from each tier's cadence, divided by the qualifying touches one salesperson can make in a year, gives the headcount needed; multiplied by loaded cost, the cost of the coverage model.
Accounts owe 46,000 touches a year. A field rep makes about 900. The plan needs 51 reps and the team has 38, so either the cadence for the lowest tier moves to an inside team or thirteen people are hired.
Headcount set from last year's budget. The cadence promised to customers cannot be delivered and nobody chose which accounts would miss out.