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Process Decision Record (PDR) – is a documented practice for recording decisions to change, introduce, or cancel processes within a team. While an ADR answers the question of which architecture to choose, a PDR defines how the team will work.

An Architecture Decision Record (ADR) is a documented process for making key architectural decisions on a project. It helps the team capture and communicate knowledge about why certain decisions were made, what alternatives were considered, and what the consequences of those decisions were.