The interface is not the starting point.
Integration conversations often begin too late in the reasoning process. Teams ask whether two systems expose APIs, whether a standard is supported or which middleware should sit between them. Those questions matter, but they describe the mechanism rather than the requirement.
A more useful starting point is operational: which person or system needs information, what decision or task depends on it, how current it must be and what should happen when the information is missing or delayed.
Map the work before the data.
Consider a diagnostic result. The technical object may be a report, a status update or a study reference. Operationally, however, it belongs to a chain of work: an order is created, a patient is identified, a procedure is performed, a specialist interprets it, a result is approved, and someone must act on that result.
If the integration design only moves the data but ignores the state of the workflow, the organisation may still rely on phone calls, spreadsheets or manual reconciliation to know what actually happened.
Interoperability needs ownership.
Every connection should have a clear source of truth, an expected destination, rules for exceptions and an owner for failures. Without those decisions, technical connectivity can create ambiguity instead of removing it.
This is why integration architecture is partly organisational design. It formalises where information is trusted, when it is shared and which workflow is allowed to depend on it.
The architecture follows the operating model.
Once the workflow is understood, technical choices become easier to evaluate. Real-time API calls may suit one interaction. Events or queued messages may suit another. Batch synchronisation may be acceptable for low-urgency reference data. A standard such as FHIR, HL7 or DICOM may be appropriate in a clinical context, but the standard alone does not define the operating behaviour.
The goal is not maximum connectivity. The goal is dependable information movement that supports a defined piece of work.