For purposes of strategy development & execution, I'm defining doctrines as what you believe to be true about your markets, your organization and your opportunities. These fundamental beliefs serve as the foundation of your organization. And more than anything else, your doctrines will define your organization's destiny.
Deciding on your Strategic Approach -- pursuit of opportunistic or prescriptive strategies -- is an essential element of strategic planning.
A professional golfer and his caddie study a golf course prior to the start of a tournament. They collect important information in order to make better decisions and to prepare strategies for how they will play the course. In a similar way, a professional executive will proactively prepare for strategy formulation before making important strategy decisions.