Normally ( ) is the longest life-cycle phase.
A. requirements analysis and definition
B. system and software design
C. implementation and unit testing
D. integration and system testing
E. operation and maintenance
查看答案
The system specification is determined after the （ ） process.
A. requirements analysis and definition
B. system and software design
C. implementation and unit testing
D. integration and system testing
E. operation and maintenance
( ) involves verifying each unit meets its system specification.
A. requirements analysis and definition
B. system and software design
C. implementation and unit testing
D. integration and system testing
E. operation and maintenance
The ( ) process partitions the requirements to hardware or software systems.
The waterfall model is so named because of the （ ）from one phase to another in the software development process.
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