It is unlikely that an authority introducing a scheme from scratch will get it right straight away. There are bound to be mistakes with over optimistic assumptions or changes in external factors.

Building in a monitoring and review process will enable necessary changes to the scheme to be made in a systematic way on the basis of best available information.

The following case studies were included in the original guide and have been updated to illustrate how management schemes develop and evolve. The authorities identified in the examples have the benefit of experience and can be seen as examples of best practice. Poole Harbour is considered to have one of the best management systems in operation in the UK and is primarily based on education and consultation but supported by a formal management structure.