When should a system architecture decision be revisited?
Revisit a decision when its original assumptions change, such as higher traffic, a new integration, or operational difficulties. Record the evidence and impact before changing direction.
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A small project benefits from a short document describing its main components, permissions, and data flow. The document can remain brief while exposing costly misunderstandings early.
Arrows should identify meaningful interactions, such as an authenticated request or a database query. Labeling the data and direction makes the diagram useful during implementation.
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