information systems defined small enterprise characteristics Information needs of the small enterprise the systems development life cycle computer information system components the role of the analyst methodologies, tools, and techniques the enhanced SDLC portfolio project Chapter 1: Information Systems in the Small Enterprise Systems Analysis and Design for the Small Enterprise section I Introduction

Chapter Objectives When you complete this chapter you will be able to: Distinguish the special characteristics and information needs of the small enterprise Outline the five phases of the systems development life cycle Identify the six components of an information system Describe the nature of entrepreneurial systems analysis Describe the purpose of CASE tools Chapter 1 Systems Analysis and Design for the Small Enterprise 2

Information Systems Defined An information system is a well-coordinated collection of resources that gather and transform data into information products and services that help the enterprise perform its designed functions An information system hierarchy associates different classifications of information systems with different audiences Chapter 1 3 Systems Analysis and Design for the Small Enterprise

Chapter 1 4 Figure 1-1: Information System Hierarchy Systems Analysis and Design for the Small Enterprise

Information Systems Defined Chapter 1 5 Three significant trends influence the evolution of information systems and provide opportunities for the entrepreneurial systems analyst: The emergence of small enterprise computing The Internet as a dominating technology The maturation of application software Systems Analysis and Design for the Small Enterprise

Small Enterprise Characteristics Chapter 1 6 The following small enterprise characteristics influence the analyst’s work: Owner participation Economic constraints Competitive pressures Systems Analysis and Design for the Small Enterprise

Information Needs of the Small Enterprise Chapter 1 7 The following are common information needs of any enterprise: Production and inventory Personnel Financial reporting Marketing, sales, and service Customer relations Systems Analysis and Design for the Small Enterprise

Computing Terminology Chapter 1 8 TECHNOTE 1-1 Systems Analysis and Design for the Small Enterprise Several software products are integral to the analyst’s work: Off-the shelf application software Software suites Computer assisted systems engineering (CASE) Object-oriented application software

The Systems Development Life Cycle Chapter 1 9 The systems development life cycle (SDLC) consists of five major phases: Analysis Design Development Implementation Maintenance Systems Analysis and Design for the Small Enterprise

Figure 1-5: The Circular SDLC Chapter 1 10 Systems Analysis and Design for the Small Enterprise

Figure 1-6: The Recurring SDLC Chapter 1 11 Systems Analysis and Design for the Small Enterprise

Information System Components Chapter 1 12 There are six major information system components: People Procedures Software Hardware Networks Data Systems Analysis and Design for the Small Enterprise Reference Figure 1-7: Information System Components

Software Classifications Chapter 1 13 TECHNOTE 1-2 Systems Analysis and Design for the Small Enterprise System Software Operating systems Firmware Utility Application Software Horizontal Vertical Turnkey Customizable Software Third-generation programming languages Fourth-generation programming language (4GL) Object-oriented programming language 4GL products

The Role of the Analyst Chapter 1 14 An agent of change A problem-solving strategist A group facilitator Systems Analysis and Design for the Small Enterprise

Figure 1-8: The Blurred Proportional SDLC Chapter 1 15 Systems Analysis and Design for the Small Enterprise

Software Ownership Chapter 1 16 ThinkingCritically Systems Analysis and Design for the Small Enterprise Under what circumstances or conditions, if any, do you feel it is appropriate to install a client’s software on your computer?

Methodologies, Tools, and Techniques Chapter 1 17 CASE Tools Visible Analyst Alternatives to CASE technologies Systems Analysis and Design for the Small Enterprise

Figure 1-10: Visible Analyst Chapter 1 18 Systems Analysis and Design for the Small Enterprise Enlarge

The Enhanced SDLC Chapter 1 19 The enhanced SDLC embodies several important concepts: The recurring nature of the SDLC The blending of several phases of the SDLC The influence of the user throughout the SDLC The addition of many powerful tools to assist the analyst Systems Analysis and Design for the Small Enterprise

Figure 1-11: The Enhanced SDLC Chapter 1 20 Systems Analysis and Design for the Small Enterprise

Portfolio Project Team Assignment 1: Your Fictional Consulting Firm Decide on a name for your systems analysis consulting firm Develop a company logo Integrate the logo into a company letterhead Create an advertising flyer for your consulting company Prepare a Portfolio Project Binder Chapter 1 21 Portfolio Systems Analysis and Design for the Small Enterprise projectPortfolio

Chapter Summary (1/3) Chapter 1 22 Small enterprise, PC-based computing should rely on proven systems theory and techniques The small enterprise approach presents special advantages for an introductory study of systems analysis The systems development life cycle provides a framework for creating a small enterprise information system Systems Analysis and Design for the Small Enterprise

Chapter Summary (2/3) Chapter 1 23 There are five phases of the SDLC: Analysis Design Development Implementation Maintenance There are six components of an information system People Procedures Software Hardware Networks Data Systems Analysis and Design for the Small Enterprise

Chapter Summary (3/3) Chapter 1 24 A systems analyst is: –An agent of change –A problem solving strategist –A group facilitator Systems Analysis and Design for the Small Enterprise

Figure 1-10: Enlargement Chapter 1 25 Systems Analysis and Design for the Small Enterprise Return