The 1980s have seen the growth of a large number of different methodologies for developing information processing systems. A manager of analyst trying to decide which methodology, if any, to use has great difficulty in trying to assess the competing claims of the many different approaches. Such comparisons as have been published tend to be based on academic criteria rather than on practical experience. They tend to focus on syntax and relatively crude analyses of the semantics of the constructs used on the methods rather than on the philosophy behind the methods and the principles they embody. This book, which is based on a joint project of CCTA of the UK government and Siemens-Nixdorf Information Systems, compares two of the major European methodologies, SSADM of CCTA and GRAPES of SNI, with the aim of assessing the feasibility of pooling the efforts of both organizations in the attempt to devise a standard European methodology.
The range of topics covered includes: - identification of the strengths and weaknesses of the two methodologies, - the possibilities of addressing any shortcomings in one approach using techniques employed in the other, - isolation of those aspects of systems analysis and design which are not covered by one of the methodologies - possibly highlighting a need to use an alternative approach.
Inhaltsverzeichnis
1 Introduction. - 1. 1 Purpose. - 1. 2 What is Being Compared? . - 1. 3 Intended Audience. - 1. 4 Study Assumptions. - 1. 5 The Task. - 1. 6 The Comparison Study. - 1. 7 Overview of the Case Study. - 1. 8 Summary. - 2 Overview of Both Methods. - 2. 1 Overview of SSADM. - 2. 2 Overview of DOMINO/GRAPES. - 3 Motivation, Background and Philosophy. - 3. 1 SSADM. - 3. 2 GRAPES History and Development. - 3. 3 Comparison. - 4 Methodology Style. - 4. 1 SSADM Style. - 4. 2 GRAPES Style. - 4. 3 Comparison of SSADM and GRAPES Styles. - 5 Architecture of the Developed Systems. - 5. 1 SSADM Architecture. - 5. 2 GRAPES Processing Architecture. - 5. 3 Examples of the SSADM Architecture in the Hi-Ho Case Study. - 5. 4 Examples of GRAPES s Processing Architecture in the Hi-Ho Case Study. - 5. 5 Comparison of the Architecture of End-Products of GRAPES & SSADM. - 6 Life Cycles. - 6. 1 The SSADM Life Cycle. - 6. 2 The DOMINO Life Cycle. - 6. 3 Coverage of the SSADM Life Cycle in the Hi-Ho Case Study. - 6. 4 Coverage of the GRAPES Life Cycle in the Hi-Ho Case Study. - 6. 5 Comparison of the GRAPES and SSADM Life Cycles. - 7 Fact Representation & Syntax. - 7. 1 Fact Representation & Syntax in SSADM. - 7. 2 Fact Representation & Syntax in GRAPES. - 7. 3 Examples of the SSADM Fact Representation & Syntax. - 7. 4 Examples of the GRAPES Fact Representation & Syntax. - 7. 5 Comparison of the GRAPES & SSADM Fact Representation & Syntax. - 8 The Knowledge Collection Process. - 8. 1 Knowledge Collection in SSADM. - 8. 2 Knowledge Collection in GRAPES. - 8. 3 Examples of the SSADM Knowledge Collection Process. - 8. 4 Examples of the GRAPES Knowledge Collection Process. - 8. 5 Comparison of the GRAPES and SSADM Knowledge Collection Processes. - 9 Transformations. - 9. 1 Transformations in SSADM. - 9. 2 Transformations in GRAPES. - 9. 3 Examples of the SSADM Transformations. - 9. 4Examples of the GRAPES Transformations. - 9. 5 Comparison of the GRAPES and SSADM Transformations. - 10 Conclusions. - 10. 1 Answers to Specific Questions. - 10. 2 Opportunities for Harmonization of GRAPES and SSADM. - Annex 1. - The Hi-Ho Recruitment Case Study. - The current Hi-Ho system. - Requirements for the new Hi-Ho system. - Sample forms in use in the current system. - Annex 2. - Hi-Ho SSADM Development. - Data flow diagrams. - Logical data model. - Logical data model-data store cross-references. - Enquiry access paths. - LDM enhanced with RDA results. - Results of ELH analysis, 1st pass. - Further DFD & LDM documentation. - Entity life histories after 2nd pass. - ECDs after 2nd pass. - After specification of deletion strategy. - Update process models. - Enquiry process models. - Function DFD equivalents. - Function input structures. - Probable function processing from stage 6. - Input/output data. - Annex 3. - Hi-Ho GRAPES Development. - Model of Required System. - Static structure. - Communication. - Behaviour. - Model hierarchy. - Reusable units. - Model of Current Situation. - Static structure. - Communication. - Behaviour. - Annex 4. - Hi-Ho SSADM Development Using Super-Events. - Annex 5. - Hi-Ho GRAPES Intermediate Diagrams. - References.
