Perspectives are different frameworks from which to explore the knowledge around sustainable sanitation and water management. Perspectives are like filters: they compile and structure the information that relate to a given focus theme, region or context. This allows you to quickly navigate to the content of your particular interest while promoting the holistic understanding of sustainable sanitation and water management.
This document explains how and when to use nominal group technique and describes the advantages and disadvantage. Furthermore, this paper contains an example of using this technique.
RECREATION AND TOURISM RESEARCH INSTITUTE (2007): Nominal Group Technique. What is a Nominal Group Technique? A Guide to Research Tools. Nanaimo: Recreation and Tourism Research Institute. [Accessed: 17.08.2010] PDF