Managing reserves requires that judgements be made about the condition of natural and cultural heritage and decisions taken as to what is, at least, an acceptable standard. Reliable information is fundamental to these tasks and for monitoring success, continuous improvement and accountability. In our opinion the Service has yet to clarify what constitutes success in reserve management and develop an adequate information base to measure its success. Consequently the Service cannot reliably determine how well it conserves and protects our natural and cultural heritage. This is a common situation for like agencies.