5e9513e7_niques_Work__Improved_Feedback__Description
[Technique] Big Design Up Front (BDUF) [Feedback Period] Months. It is typically months, and sometimes years, before stakeholders are shown working software which implements the design. [Description] 
With a BDUF approach, a comprehensive design document is developed early in the project lifecycle which is used to guide the implementation efforts.
Why Agile Software Development Techniques Work: Improved Feedback
Description