For an executive taking a new role as a corporate leader, the first 100 days are "a temporary state of incompetence" when you know the least.
You are advised not to "hit the ground running" but assess the elusive corporate culture at your new level and begin to learn what matters around you. Engage in substantive one-on-one meetings with others to elicit information about the business, build trust and test how engaged each person really is.
During this onboarding period it is valuable to have an outside coach with an independent viewpoint to brainstorm with in discussing what you are seeing and how you might best respond to each situation.
For the onboarding business case, go to: ExecutiveCoaching.us.com
Source: You're in Charge--Now What? by Thomas J. Neff and James M. Citrin (Crown Business)