Introducing Systems Design
In this new edition of Introducing Systems Design, (the companion text by the same author to Introducing Systems Analysis) the focus is on the design of computer systems. The author describes the skills necessary to be a successful systems designer and addresses the fundamental models that such a designer should follow (such as data flow diagrams and entity-relationship models). This edition retains the hypothetical case study of the first edition (a course bookings system) to explore crucial design issues. New coverage includes discussions of object oriented systems design and Rapid Application Development (RAD), including the impact of Computer Aided Software Engineering (CASE). Use of the integral case study and exercises at the end of each chapter provide the practical element essential to effective teaching of systems design.
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Rapid Application Development
Input and Output Design
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4GLs Action Diagram allocated application approach attribute candidate key chapter cleared order received COBOL CODASYL Consequendy constraints Credit cleared order customer apply data base Data Dictionary Data Flow Diagram data items data stores database Date-required DBMS defined despatch direcdy documentation effect Entity Life History entity occurrence entry errors event example Figure foreign key functional identified implementation information systems InfoSys inputs and outputs interface Introducing Systems Analysis Invoice language Logical Data Model Logical Data Structure Logical Dialogue MACHINE machine-code Machine-type menu methods milestone module node notation object object-oriented operations Order Line Order-date Order-no Order-qty orders-year to date performance Pers-no primary key procedures Product Project-code Project-code Project-code Project-description prototyping RDBMS records Region-no relation relationship requirements screen Second Normal Form specification SSADM standard Structured English systems development Third Normal Form timebox total-price valid Yes Yes