Developing and using generic specifications is as import in the sustainable procurement process as it is in the traditional procurement process. During this stage, human/labour rights and environmental performance criteria should be translated into specifications that meet specific requirements of the specified outcome, desired by the procurement action.

The specification stage is key to all types of contract. Building in environmental and social considerations at this early stage, provides a clear indication to suppliers that sustainability is important to the UN organization. Consider available alternatives which are less environmentally and socially damaging. Consider all the phases of a product’s life cycle (e.g. production, transportation, maintenance, disposal, etc) when determining its cost and environmental impact. Assess the overall environmental and social integrity of suppliers by looking at their policies and practices.

Specifications which are output-based rather than input-based can increase supplier innovation, reduce waste and minimise harmful social and environmental impacts.