描述

16 Chapter 16: Making the System Operational Systems Analysis and Design in a Changing World, 3rd Edition 16 Learning Objectives Describe implementation and support activities Choose an appropriate approach to program development Describe various types of software tests and explain how and why each is used Systems Analysis and Design in a Changing World, 3rd Edition 2 16 Learning Objectives (continued) List various approaches to data conversion and system installation and describe the advantages and disadvantages of each Describe different types of documentation and the processes by which they are developed and maintained Describe training and user support requirements for new and operational systems Systems Analysis and Design in a Changing World, 3rd Edition 3 16 Overview This chapter focuses on activities of implementation and support phases of systems development life cycle (SDLC) Implementation activities occur before system is turned over to users Implementation consumes more time and resources than earlier phases of the SDLC Support activities occur after system becomes operational and may continue for years Systems Analysis and Design in a Changing World, 3rd Edition 4 Activities of the Implementation and Support Phases Systems Analysis and Design in a Changing World, 3rd Edition 16 5 16 Program Development Program development is time consuming One-third of development labor One-third to one-half of project development schedule Programming and testing considerations: Required resources Managerial complexity System quality Systems Analysis and Design in a Changing World, 3rd Edition 6 16 Order of Implementation Input, process, output (IPO) development order Based on data flow through system Simplifies testing User interfaces developed early to reduce change Disadvantage is late implementation of outputs Structured design – IPO order based on system flowchart and structure chart OO design – IPO or

AI 摘要