The complexity surrounding heritage should therefore compel society to engage in its holistic management rather than to conserve only specific structures, as happened in the past. With the greatly widened scope of what is regarded as heritage, the increasing complexity of the problems facing it, and the need to use it sustainably, whether for tourism or for other pur- poses. care of the heritage inevitably involves making decisions about wnat cnange is. or is not, acceptable. The need to make choices between different alternatives has meant that approaches to the management of heritage areas are changing. Increasingly, it is necessary to identify the particular values(see Part 2.5) of a heritage property in order to decide how it can be changed without having an adverse impact on its values. Managing heritage is increasingly demanding and, at the same time, the outputs and outcomes expected from the management processes are ever greater.