题型描述: 多选题
There are a number of processes, activities and practices that are unique to maintainers, for example:
A.Modification Request acceptance/rejection: modification request work over a certain size/effort/complexity may be rejected by maintainers and rerouted to a developer
B.Modification Request and Problem Report Help Desk: a problem-handling process used by maintainers to prioritize, documents and route the requests they receive
C.Service Level Agreements (SLAs) and specialized (domain-specific) maintenance contracts negotiated by maintainers
D.Transition: a controlled and coordinated sequence of activities during which a system is transferred progressively from the developer to the maintainer