Five roles that a board leader alone must don, instead of merely being at the helm of meetings

In many companies, the board's still the last group to know about key decisions. But this is changing. Many boards are now shaping their companies. For boards that want to make that transition, the chair's role is key. There are a few roles that only the chair can play. The test to be applied is simple: if another director should do it, it's not on the list. Here are 5 roles the chairperson needs to don:

1. Decide who's on board