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 website describes the characteristics of focus groups and when to use this technique, containing many real-life examples. Furthermore, it explains the strengths and limitations and how to conduct a focus group.
IDRC (2003): Designing And Conducting Health Systems Research Projects: Volume 1 Proposal Development and Fieldwork. Module 10C. FOCUS GROUP DISCUSSION