Page "The Mythical Man-Month" Paragraph 18

To avoid disaster, all the teams working on a project should remain in contact with each other in as many ways as possible — e-mail, phone, meetings, memos etc.

Instead of assuming something, the implementer should ask the architects to clarify their intent on a feature he is implementing, before proceeding with an assumption that might very well be completely incorrect.

The architects are responsible for formulating a group picture of the project and communicating it to the others.