Short answer
Imagine you’re a future stakeholder who then needs to work on the system (implement, architect, deploy, test, operate, monitor or other). Then ask yourself what information you need to have…
Longer answer
- Explicitly create an overview of stakeholders (organizations, roles, people) for your system.
- Ask representatives of every stakeholder group about their needs and wishes about architecture documentation
- Prioritize their answers, add important stuff to your Definition-of-Done
- Act accordingly during development