CMSi is a software implementation of the Adaptive Management Planning approach to site management for nature conservation. This approach transforms planning from the production of a dusty, seldom-used, reference document into a dynamic and adaptable system. Learning from experience, or adaptable/adaptive management, is the key to CMSi. By storing and linking the management plan with recorded work in a database, managers can, at any time, review what has happened over a defined period. Hard facts, not anecdotes, are at hand to allow them to review the effects of site management, learn from that experience and modify their actions if necessary. In other words, planning becomes a dynamic process which can always be kept up to date.