Definition
A brief definition of Systems Analysis and Design is:
Work that involves applying analytical processes to the planning, design and implementation of new and improved information systems to meet the business requirements of customer organizations.
http://www.opm.gov/fedclass/text/GS-2200.htm
Systems analysis and Design (SAD) exists due to the fact that it allows business systems creators to adequately discover what tasks the new system has to perform, outline these tasks, and design and implement an adequately working system. With the use of SAD, all aspects of what a systems task has to be can be outlined before the design of the new system takes place. This is done to ensure that the system will perform what the end user wants of the system adequately and accurately.
Discipline
SAD is often perceived as a discipline, most likely because it is a near essential part of the creation of all new systems. SAD has been used for some time in the creation of......
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