[Volume] of [work]
with [number] people,
demand is [pattern].
When would we break,
what breaks first, and
what's the early warning?

Plan Capacity Without a Spreadsheet Model

What breaks first, and the sign you'd see beforehand.

Prompt

We handle roughly [volume] of [work type] with [number] people, and demand is [growing/spiky/seasonal]. Help me work out when we'd break, what breaks first, and what the earliest visible warning sign would be.