Resourcing · The resource estimate · Element

The cost

What it costs in money, including anything external.

The part

What it is

External costs are often the smaller number and the harder one to reverse, because they involve a contract.

Separating internal effort from external spend is what makes the two decisions independent.

The smallest level

The attributes it carries

Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.