Development frameworks such as user-centered, participatory, and agile design help by offering validated processes with predictable schedules and meaningful deliverables, why specific design methods such as surveys, focus groups, and ethnographic observation can provide information to guide requirements analysis?

Development frameworks such as user-centered, participatory and agile design

Question:

Development frameworks such as user-centered, participatory, and agile design help by offering validated processes with predictable schedules and meaningful deliverables, why specific design methods such as surveys, focus groups, and ethnographic observation can provide information to guide requirements analysis?