The SEF provides introductory guidance on the principles of evaluation, and lists ˜essential˜ and ˜desirable˜ criteria. Essential criteria are presented as the minimum recommended data for evaluating a weight management intervention. Desirable criteria are additional data that would enhance the evaluation. The supporting guidance describes why particular criteria have been categorised as essential or desirable, and gives further information on collecting data.

The SEF will be essential reading to those commissioning, running or evaluating weight management interventions.