中文摘要：

需求优先级排序是指系统参与者为需求指定实现的优先次序。是迭代开发过程中开发者制定项目迭代计划的基础．现存的需求优先级排序方法对系统参与者之间的协商和调整优先级的支持能力不足，导致根据需求优先级所制定的迭代计划难以作出符合需求变更和环境改变的调整．提出一种风险驱动的需求优先级自适应排序方法．该方法将自适应计划方法学与风险驱动相结合，将风险作为排序决策的依据，以自适应的过程为迭代开发排序需求优先级．该方法能够改善需求优先级排序过程中系统参与者之间的协商和调整需求优先级的能力，增强在迭代开发中对需求的控制，降低因需求导致项目失败的可能性．

英文摘要：

Prioritizing requirements priority is the action that stakeholders assign the orders of requirements to be implemented. It is the basement of the iteration plan. Existent methods of prioritizing requirements are inadequate to support stakeholders＇ negotiation or the adjustment of requirements＇ priorities. These shortages always lead to a rigid iteration plan that is difficult to be adjusted to adapt changes of requirements and environments. In this paper, a risk-driven adaptive method is put forward for prioritizing requirements which combines adaptive planning and risk-driven methodologies. Requirements are prioritized adaptively, and risks are used as the foundation of priorities decisions. The negotiability and adjustability of requirements priorities can be enhanced by the method. The negotiable and adjustable requirements priorities improve the developers＇ capability of controlling requirements and reduce the faults of software project caused by requirements.