Decomposition is the subdivision of project deliverables into smaller, more manageable components until the work and deliverables are defined at the work package level. This is a valuable tool for define scope. However, decomposition may not be possible for a deliverable or subproject if:
A) The deliverable or subproject is very complicated.
B) The deliverable or subproject is already being produced.
C) The deliverable or subproject will be accomplished after a very long time (i. e. far into the future).
D) None of the above: Decomposition of deliverables is always possible.
参考答案：C
解析： 分解用来把项目可交付成果划分为更小的、更易管理的组件, 通常分解到工作包层次。这在定义范围过程中是非常有用的丁具。可是, 有可能对某个可交付成果或子项目不能分解, 如果:
A) 可交付成果或子项目非常复杂。
B) 可交付成果或子项目已经被完成。
C) 可交付成果或子项目在很长时间后才能被完成。
D) 上面所有都不正确: 对可交付成果总是可以进行分解。
对于很久以后才能完成的成果或子项目，由于缺乏信息，通常不能进行分解，这体现了滚动式规划的特点。