Your quarterly number is fiction until you build it from the drivers underneath. Most teams pick a top-down target, then reverse-engineer a plan to fit it. The capacity model tells you if the number is even possible with the people you have. The comp plan decides whether those people run at the right behavior. Those are the two dials. Almost everything else is noise.
Read time: about 5 minutes. First step runnable Monday morning.
Divide next quarter's target by real per-rep productivity, and see how many ramped reps it needs.
If the rep count that implies is more than you have, the number is fiction. The gap is your first conversation with your board or your CRO, not a stretch goal you push onto the team. Most founders never run this one division, so they commit to a number the math never supported.
Start here: pull closed-won per fully-ramped rep from your last two quarters. Divide the target by that figure. You need a CRM export of closed-won by rep, plus each rep's start date.
Ignore this week: do not redesign the whole comp plan yet. Prove the number is possible first, then re-point one behavior.