One lesson learned in a recent Integration was the impact of not moving more swiftly to the new organisational structure, or at the very least, developing and publishing the Target Operating Model (TOM) earlier. I was leading the Integration but was not responsible for the TOM, which was a separate workstream, led by consultants under direction from the Executives. The absence of a clearly defined TOM slowed down execution. Leaders were politically hampered at the exact moment they needed authority and momentum to drive change. Having a TOM in place early—even if refined later—would have provided clarity, reduced resistance, and enabled leadership to act with the speed and confidence required to unlock the benefits of the deal.