One of the most common merger philosophies we hear goes like this: “We’re going to take our time, do it right, and form a new culture that represents the best of both worlds.”
That sounds good in theory, but it’s a high-risk proposition. Our experience is that companies almost never pull it off successfully.
It makes about as much sense as a man and woman who marry and announce that they plan to blend their two personalities into one... 50-50... at the same time that they’re trying to adjust to all the routine stresses and strains of married life. It’s a recipe for failure, whether you’re talking about a marriage or a merger.
The “best of both worlds” strategy for integrating corporate cultures brings traumatic destabilization to both organizations. Managers in both companies end up struggling to manage an unfamiliar situation. They can’t necessarily draw on their previous successful experience as they wrestle with subtle and not-so-subtle ramifications of cultural shifts. Besides, after all is said and done, one of the two  cultures virtually always comes out on top anyhow.
We recommend a much more pragmatic, business-oriented approach ...