Unwelcome surprises in the life of any organization can often be traced to the failure of an assumption that the organization's leadership didn't anticipate or had "forgotten." Assumption-based planning (ABP) is a tool for identifying as many as possible assumptions underlying the plans of an organization and bringing them explicitly into the planning process. This book presents a variety of techniques for rooting out those vulnerable, crucial assumptions. It also presents steps for monitoring the vulnerable assumptions of a plan by taking actions to control them where possible and preparing for potential failure where control is not possible.
Based upon a planning methodology developed at the Rand Corporation for the military, assumption-based planning is really what happens after a strategic plan is developed. Planners carefully review the plan to see if the assumptions make sense and are likely or unlikely to fail. Filled with jargon that they created when the author and his colleagues created this process, so part of learning about this process is just learning the jargon. Still, testing the assumptions on which your plan is based is a good idea. This just belabors the point.