One project usually opens the other three.
A single door leads to the rest of the stack, more often than not.
A service management consolidation
Separate service desks brought onto one platform, scoped as a platform engagement.
Change control
A CMDB and approval workflows. Deciding what "approved" means before anything gets automated.
An identity workstream
SSO and access design became an explicit line in the scope. Who can touch what had to be answered first.
Agents
Once ownership exists, agents come next. Scoped as the following phase, not the first.