| Summary: | 碩士 === 國立中央大學 === 資訊管理研究所 === 84 === The system analysis(SA) plays an important role in the
process of developingan information system(IS), though the
methodology and tool used are the keys toa qualified system
analysis. System analysis methodology currently used
focusheavily on the ''Data'' and the ''Process'' of the system
examined. Besides thesetwo factors, the ''Business Flow'' should
be included to be completed in theinformation system analysis
process. The business flow is the rules to thebusiness
activities, including the procedure, place and the person in
charge. ! The main purpose of system analysis is to extract
every piece of informationabout the system by user interview and
data collecting, and to construct a clearmodel as a blueprint
when developing the information system. Though
differentterminology are used by both users and system analysts,
which often leads tocountless misunderstanding. A general and
understandable language between themis needed to bridge the gap
in this communication intensive process. To minimize the
communication gap and to discover the exact systemrequirements
have always been the system analysts'' targets. The ''Business
andData Flow Diagram'' (BDFD) proposed here enhance the system
model with thedefinition of the operation procedures which lacks
in previous system analysismethodology. Thus we may pertain the
integrity of this system and decrease thechances of
misunderstanding by making use of this new concept.
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