Accountability
In this conceptual structure, after planning, the performer makes a promise to the customer, with a well-defined scope, duration, and deliverable results of work. The performer is responsible for keeping this promise (for which they may rely in turn on promises made to them). It should be clear to both the customer and performer whether or not this promise has been kept. If the performer does not keep this promise, and especially if they do not keep similar promises repeatedly, the customer may decide not to ask them to do this work again, to change the composition of the team, etc.
A promise not being kept is not assumed to be a personal failing — it could be the result of sub-optimal matching, communications problems, sub-promises not being kept, etc. — but from the perspective of coordination, promises not being kept indicates that some kind of restructuring must take place in order to restore functionality.
Next, see Operational structure.