This is such an important question, because in many cases an “underperforming deal” is really an underperforming integration. Organizations often devote enormous resources to valuation, deal structuring, and due diligence, but once the deal closes, integration is expected to happen in the background while business continues as usual. The irony is that integration is not a side project – it’s a full organizational transformation that affects people, processes, systems, culture, and decision rights all at once. When integration is under‑resourced or lacks senior sponsorship, teams revert to old habits, leaders become stretched, and synergy targets quickly slip into unrealistic territory. Success requires treating integration as a strategic initiative with its own governance, empowered leadership, and dedicated capacity – not as an operational afterthought. In most failed mergers, the deal logic was sound; it was the lack of focused, disciplined integration that ultimately diluted the value.