Key points are not available for this paper at this time.
Both agile and plan-driven approaches have situation-dependent shortcomings that, if not addressed, can lead to project failure. The challenge is to balance the two approaches to take advantage of their strengths in a given situation while compensating for their weaknesses. The authors present a risk-based approach for structuring projects to incorporate both agile and plan-driven approaches in proportion to a project's needs.
Boehm et al. (2003) studied this question.