Structured Analysis and Design of Information systems

1984 ◽  
Vol 26 (9) ◽  
pp. 46
Author(s):  
David Albury
Author(s):  
Ajantha Dahanayake

The first case study focuses on evaluating the capability of the CAME environment of supporting a problem area that requires a structured analysis and design method. The specific problem lies in the financial and administration sector of the example problem, Dutch flower auction (see Chapter 3). Financial administration is an activity that is required frequently within organizations, and the analysis, design, and development of such an information system are normally supported by a structured analysis and design method. This case investigates the modeling process and techniques required for a popular structured analysis and design method known as the YOURDON method. The financial and administration sector’s problem is used as the problem area of this case study based on the following considerations: a problem preferably of a general nature, meaning that development of similar information systems is common, is the object of investigation. The Dutch flower auction’s financial and administration sector’s problem is one of a typical data processing nature, and this is clearly a frequently occurring problem area in information systems development. The problem area has to be such that a structured analysis and design method would be adopted during information systems analysis and design. Otherwise it could not be considered to be information systems modeling support according to a structured analysis and design method. The YOURDON method (Yourdon, 1989) is particularly well known for its support of the problem area of data processing and real-time systems analysis and design. This means all clones of the YOURDON method described in literature include the real-time analysis and design. The selection of the YOURDON method to investigate this particular problem is based on the preference of students who worked with this particular example problem based on the course “Information Systems Analysis and Design Methodologies” at Delft University of Technology. The various versions of the YOURDON method give varying interpretations of its modeling techniques Data Flow Diagram (DFD), Entity Relationship Diagram (ERD), and State Transition Diagram (STD). The automated support must provide not only the required modeling techniques, but also the different variations of these techniques as required to deal with the problem area.


Objectives: The main aim of this study was to investigate the factors that influence students’, academicians’, clients’, as well as developer’s preferences in choosing their preferred approach in system development, namely structured analysis design (SAD) or object-oriented analysis and design (OOAD). Methods: The research design was based on a survey methodology and a case study. For the survey, questionnaires were administered to 30 students and 38 academicians, who were randomly selected from several Malaysian universities. For the case study, the requirements of the information system were modeled and presented to several clients to elicit their feedback. The survey data were analyzed using SPSS Findings: The result shows that students preferred the use of OOAD approach, which clearly outnumbered those who preferred the SAD approach, which stood at 33%. Interestingly, the majority (53%) of academicians preferred the use of a mixture of both approaches. Likewise, the clients shared a similar view with the academicians, whereas the developer preferred the OOAD approach. Application/Improvements: Clearly, the findings suggest that both approaches are essential, but the one that is widely used by developers and preferred by students is OOAD, and thus should be given priority when it comes to structured analysis and design. As such, curriculum designers and institutions of higher learning, particularly those offering system analysis and design and related courses, should make the necessary changes to the existing curriculum such that the academic programs offered will be able to produce highly competent and skilled analysts and designers as required by the industry.


2019 ◽  
Author(s):  
Benaldo Salim

IDEF0 (Integration Definition language 0) adalah suatu metode pemodelan sistem berbasis SADT (Structured Analysis and Design Technique), yang dikembangkan oleh Douglas T. Ross dan SofTech, Inc. Dalam bentuk aslinya, IDEF0 meliputi bahasa definisi dan pemodelan grafis (syntax and semantics) yang menggambarkan suatu metodologi komprehensif untuk membangun model. IDEF0 dapat digunakan untuk memodelkan berbagai jenis sistem baik yang otomatis maupun non-otomatis.


Author(s):  
O. Latysheva ◽  
◽  
Ye. Pidhora ◽  
V. Fokin ◽  
◽  
...  

The article investigates the approaches of building business process, forming the strategy of the enterprise. The procedure of methodology usage for functional modeling and graphical representation of IDEF0 notation processes (English Integration Definition for Function Modeling) for the procedure of enterprise strategy development is presented. The algorithm of procedure modeling for forming the company's strategy is developed and for that the SADT (Structured Analysis and Design Teqnique) diagram and its decomposition by the main elements and stages is presented.


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