Project members should create an ADR for every architecturally significant decision that affects the software project or product, including the following (Richards and Ford 2020):

Structure (for example, patterns such as microservices)

Non-functional requirements (security, high availability, and fault tolerance)

Dependencies (coupling of components)

Interfaces (APIs and published contracts)

Construction techniques (libraries, frameworks, tools, and processes)

Functional and non-functional requirements are the most common inputs to the ADR process.

https://docs.aws.amazon.com/prescriptive-guidance/latest/architectural-decision-records/adr-process.html