The challenge
Two plans cannot answer one question
On day one after a merger, leadership inherits two portfolios: two lists of critical initiatives, two sets of teams already at full stretch, two planning processes and often two PMOs with their own tools. The first integration question is rarely what to build. It is what to stop, merge or sequence so the combined company can deliver at all.
The common reflex is to standardize the tools first: pick one PPM, migrate the other side, retrain everyone and plan once the data is clean. Meanwhile, the integration targets keep their dates. Every target is a capacity question in disguise. Consolidating two platforms takes specific teams, skills and months, from people who are also running the business and finishing what each company committed to before the deal.
Integration plans built in finance models without a capacity view are optimistic by design. In the steering committee, every sponsor is sure their initiative is essential, and one side plans in quarters while the other plans in sprints. Without a shared plan, each decision turns into a debate about whose numbers are right.