The unit
What one unit of capacity actually is, and why every plan silently mixes several of them.
What a Unit of Capacity Is
What one unit of capacity actually is, the five units in common use, and why a plan that mixes them is wrong before any forecast is applied.
FTE, and What It Hides
Why the full-time equivalent is the most convenient unit and the most misleading, the four things it conceals, and when to use it anyway.
Hours as a Unit
Why hours are the right internal unit for a capacity account, the two kinds of hour that get confused, and the places where hours mislead.
Slots, Seats and Benches
Capacity that is not made of people: why a slot behaves differently from an hour, the simultaneity constraint, and how to hold two accounts without adding them.
The Unit the Demand Side Uses
Why demand arrives in people and vagueness, how to convert a claim into something an account can hold, and the four questions that do the conversion.
Converting Between Units
The three conversions every capacity plan performs, where each one loses information, and how to make the loss visible instead of silent.
Writing the Unit Down
The one-paragraph header that makes a capacity plan checkable, what belongs in it, and why it is the cheapest piece of documentation in planning.