Systems for data processing, anaylsis and representation

Allam, Mosaad; Plunkett, Gordon

Bibliographic data

Monograph

Persistent identifier:: 1067490280

Title:: Systems for data processing, anaylsis and representation

Sub title:: ISPRS Commission II Symposium : June 6 - 10, Ottawa, Canada

Scope:: 1 Online-Ressource (XX, 530 Seiten)

Year of publication:: 1994

Place of publication:: Ottawa

Publisher of the original:: The Surveys, Mapping and Remote Sensing, Natural Resources Canada

Identifier (digital):: 1067490280

Illustration:: Illustrationen

Signature of the source:: ZS 312(30,2)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Allam, Mosaad; Plunkett, Gordon

Corporations:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Adapter:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Founder of work:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Other corporate:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: [Wednesday, June 8, 1994]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: [Session G-2 WG II/5 - Integrated Production Systems]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: SELECTION OF AN OPTIMUM STRUCTURED METHODOLOGY FOR DEVELOPING AN INFORMATION SYSTEM; A GENERAL MODEL. C. M. Paresi, M. M. Radwan, O. U. Essien

Write comment:: Text parallel in englischer und französischer Sprache abgedruckt.

Document type:: Monograph

Structure type:: Chapter

es liser ative n en lS Ce ridéo lules lent, e et Létés .f de irin, 1° Où > ces dele nées image jets sont les aux |'e et on yv 'cine Lque. une Lbles SELECTION OF AN OPTIMUM STRUCTURED METHODOLOGY FOR DEVELOPING AN INFORMATION SYSTEM; A GENERAL MODEL. C.M. Paresi, M.M. Radwan, O.U. Essien International Institute for Aerospace Survey and Earth Sciences ( ITC ) P.O. Box 6, 7500 AA Enschede, The Netherlands KEY WORDS: Information Systems, Structured Development Methodologies, Optimum Methodology, Evaluation Model. ABSTRACT Where the overall intent is a realistic and organised control of the System Development process, with a resultant effective Information System, then it becomes imperative that the Methodology chosen for the development of the System, should be optimum for that Object System. The paper shortly reviews the characteristics of Structured Development Methodologies. It then focuses on the determination of a general evaluation model criteria for selecting an optimum Structured Development Methodology applicable to a large number of problem domains. An overview of the model is first presented, followed by an explanation of the steps in the process of evaluation. INTRODUCTION In the development of Information Systems which could be Administrative, Technical, or Managerial, Structured Development Methodologies have been used to create systems that give an effective communication between the system users, the machines that support the systems operations, as well as the human factors in information exchange. The bottom line is an efficient and organised control of the system development process. The number of these Methodologies have of recent increased considerably in the Information Science/ Technology scene. Some look similar in many respects, some use techniques that overlap in concepts, the advantages or otherwise of some are more apparent in some types of Systems than the others, and some lay more emphasis on some aspects of Information Systems development. Therefore, a research was initiated on the determination of a general evaluation model criteria for selecting an Optimum Structured Development Methodology applicable to a large number of problem domains. The philosophy of the model is based on the fact that it is unlikely at the moment, to have a single methodology that can satisfy all the phases and stages during system development. Therefore for a particular Object System, development phases/stages are identified according to their relative importance. The methodologies are then examined for how well they provide for the individual phases/stages. Based on the peculiar circumstances of the Object System under study, several contingencies/criteria can be determined and embedded in a general framework through which the methodologies would be evaluated. The model makes provisions for levels of detail to be examined in the Object System, the levels of decomposition to which phases/stages of the Object System can be reasonably subjected, and also a means of reducing subjectivity inherent in this type of evaluation. It is possible to carry out the evaluation either for each phase, or the entire phases put together. It can also be decided using a contingency sub-model, whether the development strategy should be the use of only prototypes, specifying, or a mixture of both. The model recognises the influences from issues collateral to the Object System. WHY STRUCTURED DEVELOPMENT METHODOLOGIES? Systems Development is a non-trivial task; it costs time and money because of the complex nature of modern Information Systems and therefore needs a clear step by step approach in the process of development. This is the concept behind Methodologies. It defines the pieces or components, phases and activities that one finds in a typical System Development project; and also the interface between those components [Burch,1979]. The most important factor for the need for Methodologies is the limitation of the human mind to perceive and retain all information it requires and to act on it promptly [Dippel, 1969]. A Methodology should have as general objectives, to : Analyse the complexity of problems and simplify them; achieve unity of System Architecture; establish and improve interaction between users and System Development Team; enable efficient parallel development of Sub Systems; achieve sound data analysis and administration through a well defined procedural framework [Elving & Kirchoff, 1991]. A Methodology should specify: How a project is to be broken down into phases, activities for each phase, outputs for each phase, when activities should be executed, constraints to be applied, support tools to be utilized, and how projects have to be managed. Techniques (which can be diagrams, tables etc.) should be recommended at various stages for carrying out particular activities recommended by a Methodology. 257

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