Because a year is too distant to steer by and a day is too noisy to judge by. Ninety days is the horizon where the target stays close enough to feel urgent and long enough for real change to compound — which is why the goal lesson rebuilds the annual arithmetic at quarter scale instead of just dividing the year by four and hoping.
The short answer
The lesson's 90-day example runs the same division: an annual production figure of $240,000 becomes $60,000 per 90 days — a block with its own sales count and appointment requirement, derived from the rep's commission and close rate exactly as the annual version is. The block is the unit of accountability: long enough that a bad week is recoverable inside it, short enough that a bad block can't hide. Four honest quarters are how the past-tense annual goal stops being a slogan.
How it runs
Skills compound in quarters, not days: a framework weakness identified, drilled for a season, and re-measured shows up inside 90 days; inside 9 days it just looks like noise. The target structure mirrors the training structure — Fight Camp itself is organized as a 90-day progression from zero-knowledge rep to sales pro — because the mind holds a quarter-sized commitment the way it can't hold a year-sized one: as a season with a scoreboard, not a resolution with a anniversary.
Go deeper
Spar's rounds train the reps who run them — the reps who show up daily get the reps. Round 1 is free; the full camp is $29/month. Spar before you knock.