I posted an article recently about the importance of people in M&A (I don't mean the suits doing the deal, I mean the employees who work for the organisations involved!).
Whilst it is often the case that DD on management teams will be carried out during a process it is less likely that any similar exercise will happen for the lifeblood of the business - its workforce.
I am not suggesting that this sort of approach will work on all deals - the costs are likely to be prohibitive in the lower mid market - but it is certainly something worth putting on the critical path. Any action to improve team working either immediately pre or post transaction is likely to have huge benefits as the two businesses continue their journey into the future.
HP and Compaq had already poured hours into due diligence on their contrasting cultures before the deal was complete. According to one study, it involved 127 executives and 138 focus groups with 1,600 staff in 22 countries. Yet still some of their teams rubbed each other up the wrong way, because using such methods to assess cultural fit is a bit like trying to adjudicate a 100m sprint with an egg timer and a pinhole camera.