The aim of this paper is to critically examine the application of development appraisal to viability assessment in the planning system. This evaluation is of development appraisal models in general and also their use in particular applications associated with estimating planning obligation capacity. The paper is organised into four themes:
· The context and conceptual basis for development viability appraisal
· A review of development viability appraisal methods
· A discussion of selected key inputs into a development viability appraisal
· A discussion of the applications of development viability appraisals in the planning system
It is assumed that readers are familiar with the basic models and information needs of development viability appraisal rather than at the cutting edge of practice and/or academ
