What makes plan implementation successful? An evaluation of local plans and implementation practices in New Zealand

Failure to implement plans has long been considered a significant barrier to effective planning. We examine two conceptions of success in plan implementation (conformance and performance), the effects of the implementation practices of planning agencies, and the capacity of agencies and permit applicants to bring about success. A key lesson from our New-Zealand-based evaluation is that implementation is somewhat weak. Another key point is that, if implementation is defined and measured in terms of conformance, plans and planners have an important influence on implementation success. Alternatively, if implementation is defined and measured in terms of performance, plans and planners are less influential in implementation. These lessons have broad implications for the theory and practice of plan implementation.