The C4 Model

Appendix. Diagram Review Checklist

Diagram Review Checklist
General
Does the diagram have a title?	Yes	No
Do you understand what the diagram’s type is?	Yes	No
Do you understand what the diagram’s scope is?	Yes	No
Does the diagram have a key to describe any notation used?	Yes	No

Elements
Does every element have a name?	Yes	No
Do you understand the type of every element? (level of abstraction; software system, container, component, etc.)	Yes	No
Do you understand what every element does?	Yes	No
Where applicable, do you understand the technology choices associated with every element?	Yes	No
Do you understand the meaning of all acronyms, abbreviations, and code names used?	Yes	No
Do you understand the meaning of all colors used?	Yes	No
Do you understand the meaning of all shapes used?	Yes	No
Do you understand the meaning of all icons used?	Yes	No
Do you understand the meaning of all border styles used? (solid, dashed, dotted, etc.)	Yes	No
Do you understand the meaning of all element sizes used? (e.g., small versus large boxes)	Yes	No

Relationships
Does every line have a label describing the intent of that relationship?	Yes	No
Does the description match the relationship direction?	Yes	No
Where applicable, do you understand the technology choices associated with every relationship? (e.g., protocols for interprocess communication)	Yes