What should remain in the group ERP, CRM, or IAM?
The ERP often remains the central source for some data. The question is what stays there and what gets exposed elsewhere.
In a group, this trade-off becomes strategic as soon as a new use case, portal, or interface connects to the existing core. Teams must then open it without weakening it.
How do you open the existing core without weakening it?
The CRM keeps the commercial relationship, but must be cleanly connected to the group’s other business objects.
The real difficulty is avoiding the CRM telling a different story from ERP, contracts, or delivery files. Integration must restore a shared view of the same accounts and commitments.
Which objects must remain coherent across entities and systems?
Identity and roles must stay coherent across entities, portals, and exposed applications.
When several entities share the same platform, IAM is no longer a secondary topic. It becomes the key to knowing who sees what, where a local scope stops, and where group responsibility starts.
How do you monitor exchanges to avoid blind spots?
The bus or integration layer exists to govern exchanges, errors, and traceability between systems.
It must not become one more black box. Its role is to make group workflows more readable, more monitorable, and easier to recover when a synchronization degrades or a local system diverges.
