قرار الجمعية العامة 55/232 المؤرخ 23 كانون الأول/ديسمبر 2000 بشأن الاستعانة بمصادر خارجية
Additionally, UNDP suggests the need to work out common guidelines for the United Nations system, for example by using the IAPWG forum, on the conduct of cost-benefit analyses, development of decision flow charts, establishing analysis criteria and quality assurance, and performing independent verification and validation (see recommendation 9).