Principles

The principles particular to designing software before the code, in three groups. Each follows the format of the reader-ergonomics principles; a principle that standard already holds is linked, never restated here.

Group	What it covers
Specification: before the code is written	what an algorithm's specification holds for its implementer
Decision: proposing a design and keeping the choice	the design document and the decision record
Structure: describing and drawing a system	the architecture description and the system diagram