In creative work that is collaborative,
there are 2 kinds of jobs:
Filters and Generators.

Filters are people who decide what makes the cut and what doesn’t.
Their job is to edit with good taste.

Generators create the actual Thing.
It is not the job of a Generator to decide what is good enough and what is not.

Filters can be disinterested in a way Generators cannot,
they are free to demand new things, to push,
they can recognize genius where Generators might be too self-critical;
and Generators are free from the hundreds of people to please,
the financial and political considerations, et cetera.
Generators can be pure Creators.

Good Generators and Filters recognize their roles,
they provide strength at the exact place the other is weak.

A wonderful book of this subject is “Maps of the Imagination: The Writer as Cartographer” by Peter Turchi http://amzn.com/159534005X