Begin with the business flow
The integration estate is often described as a list of platforms. A better starting point is the business journey those platforms support. Select a process such as partner onboarding or order exchange. Trace its source systems, transformations, handoffs and receiving applications. Record who owns each step and what happens when it fails. This becomes the basis for deciding what should change.
Build a baseline that can guide decisions
Inventory interfaces, platform dependencies and support responsibilities. Add evidence about transaction patterns, service commitments, failure modes and manual work. Capture the time spent investigating exceptions as well as the infrastructure and software involved. Keep assumptions visible. A baseline is useful when it helps compare options; it does not need to be perfect before the first improvement.
Separate a platform move from an operating-model change
A new runtime can leave old delivery problems intact. Define the future approach to versioning, deployment, monitoring, access and support alongside the migration design. Agree which integration patterns should be reusable. Decide how teams will test a change and how operators will see its business impact. These decisions create consistency across environments, even while multiple platforms coexist.
Choose the first migration wave deliberately
Select a bounded set of flows with understood dependencies and a business owner who can validate behavior. Avoid choosing only the easiest technical example if it teaches little about the real estate. Define acceptance criteria for normal processing, exceptions, replay and recovery. Rehearse the transition and the response to a failed cutover. Keep the rollback decision explicit.
Measure the operating result
After the migration, compare the effort to deliver and operate the flow with the baseline. Review incident investigation, change lead time, manual handling and the clarity of ownership. Ask the people using the process whether information arrives when they need it. Use these findings to refine the pattern before the next wave.
Workshop checklist
Bring an interface inventory, a representative business journey, known incident examples and current support responsibilities. Leave with a prioritized starting point, agreed decision owners, acceptance criteria and a plan for the next architecture decision. The purpose is to make modernization manageable, not to commit the enterprise to every future step at once.