The Quality Frame can either be applied with or without the use of a rating scale for each of the key criteria and standards. Use of a rating scale is a valuable tool if one wishes to make comparisons between projects, or if the intention is to gain an overview of the quality of a large portfolio of projects over time. Link between the quality frame and the EC’s evaluation and audit criteria The five criteria used by the EC to evaluate the success of projects or programmes are: (i) relevance; (ii) efficiency; (iii) effectiveness; (iv) impact and (v) sustainability (see section ). The two.