1. Hidden dependencies multiply At the start, everything looks clean on paper—separate streams, separate goals. But then someone says, “Wait, aren’t we both changing the same data field?” Suddenly, one project can’t move because it’s waiting on another. And no one saw it coming early enough. You end up firefighting issues that were never even on the plan.

2. Priorities start to conflict Every project is “high priority.” Every sponsor wants their piece delivered yesterday. So your team gets pulled into five directions at once—urgent requests, last-minute changes, escalations. Instead of moving forward, you’re constantly reshuffling what matters most this week.

3. Resources become diluted Your best people are everywhere. The same architect is in three workshops a day. The same SME is answering questions from multiple teams. They’re busy all the time—but not actually productive. Context switching kills momentum, and mistakes start creeping in simply because no one has the space to think properly.

4. Decision-making slows down More projects mean more coordination. More stakeholders. More meetings to “align.” Simple decisions suddenly need five approvals. You spend days discussing things that should’ve taken an hour. It feels like progress—but nothing really moves.

5. Integration risk increases This is where it really hits. Different teams build things in parallel, assuming everything will connect later. Then integration starts… and things don’t fit. Data doesn’t match. Processes break. You go into rework mode, fixing issues under pressure, often close to go-live.