System Analysis and Design

Overview

Data and Information - Types of information: operational, tactical, strategic and statutory - why do we need information systems - management structure - requirements of information at different levels of management - functional allocation of management - requirements of information for various functions - qualities of information - small case study - Systems Analysis and Design Life Cycle: Requirements determination - requirements specifications - feasibility analysis - final specifications - hardware and software study - system design - system implementation - system evaluation - system modification. Role of systems analyst - attributes of a systems analyst - tools used in system analysis - Information gathering - strategies - methods - case study - documenting study - system requirements specification - from narratives of requirements to classification of requirements as strategic, tactical, operational and statutory. Example case study - Feasibility analysis - deciding project goals - examining alternative solutions - cost - benefit analysis - quantifications of costs and benefits - payback period - system proposal preparation for managements - parts and documentation of a proposal - tools for prototype creation - Tools for systems analysts data flow diagrams case study for use of DFD, good conventions - leveling of DFDs - leveling rules - logical and physical DFDs software tools to create DFDs - Structured systems analysis and design - procedure specifications in structured English - examples and cases - decision tables for complex logical specifications - specification oriented design vs procedure oriented design - Data oriented systems design - entity relationship model - E-R diagrams - relationships cardinality and participation - normalizing relations - various normal forms and their need - some examples of relational data base design

Data input methods - coding techniques - requirements of coding schemes - error detection of codes - validating input data -input data controls interactive data input - Designing outputs - output devices - designing output reports - screen design - graphical user interfaces - interactive I/O on terminals - Object oriented systems modeling - what are objects? - why objects? - objects and their properties - classes - inheritance - polymorphism - how to identify objects in an application - how to model systems using objects - some cases of object oriented system modeling - Control - audit and security of information systems - why controls are needed - objectives of control - techniques used in control - auditing information systems - auditing around, through and with the computer - testing information systems - types of tests - how to generate tests - security of information systems - disaster recovery - business process continuity - Systems analysis and design in the era of electronic commerce - B2B, B2C and C2C e-commerce - advantages and disadvantages of e-commerce. E-commerce system architecture - physical networks, logical network, world wide web, web -services - html, XML - Electronic data interchange - EDI standards - virtual private networks - XML and EDI - Security of e-commerce transactions, firewalls - encryption methods - symmetric and asymmetric encryption - digital signature - certifying authorities for signatures - legal status of e-commerce transactions - Payment systems in e-commerce - cheque payment, credit card payments, e-cash payments - Complete system analysis and design case studies - a system for journal acquisition in libraries - walk through the entire life cycle