Start with the operating journey
A request may begin in a portal, move through an approval, update an ERP record and end in an operational handoff. Reviewing each screen separately can hide the decisions and dependencies between them. Begin by mapping the trigger, the people involved, the decision points and the expected outcome. Include the exceptions that cause work to leave the normal path.
Make the connections explicit
For each handoff, identify the system that owns the information, the rule that allows the work to progress and the person responsible when it cannot. A shared view of these connections helps teams discuss scope before selecting an interface or implementation approach. Keep business ownership visible alongside technical ownership.
Build a foundation that can evolve
Use the operating map to choose a coherent first release. Define what will be delivered, what remains manual and how the release will connect to existing systems. After delivery, review exception paths and user feedback against the same map. This gives the next improvement a business context instead of treating every request as another isolated feature.
A useful architecture discussion starts with a business journey, its owners and the connections required to complete it.