Here are few thoughts regarding your question. When you say “top” managers, are those Directors or V.P levels? If yes, I would think there are issues with 1) workload/responsibilities 2) lack of proper prioritization and 3) lack of acceptance/understanding of the importance of integration process. Many times, their minds are in the silo mode, worried about their area and from literature and our instruction, tend to underestimate the importance and negative impact of a “poor” integration. They need to understand the time spent up front in planning will save them time and pain later. The trick is how to get them to get on board without alienating them.