a) The cost and time required to create project deliverables can be estimated, and it is desirable that decomposition be performed up to the manageable level.
b) When system development is outsourced, all decomposition of deliverables should be left to the discretion of the outsourcee that creates the deliverables.
c) Since a meeting that is held to report the progress of a project is a means of communication, the meeting is not subject to decomposition.
d) If there are some experiences in developing similar systems, it is not necessary to perform decomposition again.