The（）is a general description of the architecture of a workflow management system used by the WFMC, in which the main components and the associated interfaces are summarized. The workflow enactment service is the heart of a workflow system which consists of several（）. In a workflow system, a process is specified using the process definition tool. Usually, processes are defined in terms of a（）, which consists of（）indicated using a circle, and（）shown as a rectangle. These two components can be linked by means of a directed arc.

processes are defined in terms of a（）

A．PERT diagram

B．DFD

C．Petri Net

D．ER diagram

范围说明书形成了项目经理与项目客户之间的协议基础，这是因为它确定了（）

A.项目经理和项目团队

B.实施项目的利益

C.项目目标和交付物

D.详细的产品特性