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chapter13

chapter13. section IV Development. for the Small Enterprise. Systems Analysis and Design. the pc solution networking solutions internet, intranet, and extranet solutions the cornucopia case portfolio project. Chapter Objectives. When you complete this chapter you will be able to:

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chapter13

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  1. chapter13 section IV Development for the Small Enterprise Systems Analysis and Design the pc solution networking solutions internet, intranet, and extranet solutions the cornucopia case portfolio project

  2. Chapter Objectives When you complete this chapter you will be able to: • Describe the key hardware issues relating to the system under development • Describe the key software issues relating to the system under development • Install an information system that complies with the computer’s hardware and system software environment • Describe how networking technology influences small-enterprise information systems • Describe how Internet and intranet technologies influence small-enterprise information systems Systems Analysis and Design for the Small Enterprise 2 Chapter 13

  3. The PC Solution Inherent in the small-enterprise project is the assumption that a desktop computer could function as the hardware platform for the information system. This assumption includes the possibility, perhaps inevitability, that the system will include several desktop computers networked together. Regardless of the number of computers employed in the system, there are several fundamental desktop-related issues the analyst must consider. Systems Analysis and Design for the Small Enterprise 3 Chapter 13

  4. Figure 13-1: Evolution of the PC Microprocessor Systems Analysis and Design for the Small Enterprise 4 Chapter 13

  5. Figure 13-2: PC Hardware Diagram Systems Analysis and Design for the Small Enterprise 5 Chapter 13

  6. Figure 13-3: Critical Hardware Performance Issues and Acronyms Systems Analysis and Design for the Small Enterprise 6 Chapter 13

  7. Figure 13-4: PC Operating System Diagram Systems Analysis and Design for the Small Enterprise 7 Chapter 13

  8. Figure 13-5: Critical System Software Issues Systems Analysis and Design for the Small Enterprise 8 Chapter 13

  9. Figure 13-6: System Environment Users Information Systems 4GL Products System Software System Hardware Systems Analysis and Design for the Small Enterprise 9 Chapter 13

  10. Figure 13-7: Windows XP User Accounts Dialog Boxes(top & middle) Systems Analysis and Design for the Small Enterprise 10 10 Chapter 13

  11. Figure 13-7: Windows XP User Accounts Dialog Boxes(bottom) Systems Analysis and Design for the Small Enterprise 11 Chapter 13

  12. Figure 13-8: Adding PRC to the Start Menuand as a Shortcut Icon Systems Analysis and Design for the Small Enterprise 12 Chapter 13

  13. Figure 13-9: Information System Security Systems Analysis and Design for the Small Enterprise 13 Chapter 13

  14. Networking Solutions Networking is fast becoming the accepted baseline standard for information systems of all sizes. The small enterprise can begin with a simple modem connection to the Internet and a peer-to-peer network, and then progress to a local or even wide area network. The analyst working on a small-enterprise’s first-time information system should be alert to the future networking requirements of the enterprise, even if the present design does not include a network. Systems Analysis and Design for the Small Enterprise 14 Chapter 13

  15. Figure 13-10: Network Diagram Systems Analysis and Design for the Small Enterprise 15 Chapter 13

  16. Figure 13-11: Wireless LAN Diagram Systems Analysis and Design for the Small Enterprise 16 Chapter 13

  17. TECHNOTE 13-1 TCO and the Net PC Total cost of ownership (TCO) is a term that describes the sum of costs associated with a computer system acquisition, installation, and maintenance. A net PC or thin client describes a desktop computer tailored to perform the tasks required of a desktop computer installed as a network client. In theory, TCO is minimized if each piece of the system is perfectly matched to its anticipated performance requirements. Systems Analysis and Design for the Small Enterprise 17 Chapter 13

  18. Figure 13-12: File Server Diagram Systems Analysis and Design for the Small Enterprise 18 Chapter 13

  19. Figure 13-13: Database Server Diagram Systems Analysis and Design for the Small Enterprise 19 Chapter 13

  20. Figure 13-14: Network Productivity Products Systems Analysis and Design for the Small Enterprise 20 Chapter 13

  21. TECHNOTE 12-2 Applications Development without Programming A computer information system is broader in scope and function than a customized application. An informal SDLC methodology may be helpful to the custom application developer. While many custom application building tools exist, developing an information system still requires programming skills. Systems Analysis and Design for the Small Enterprise 21 Chapter 13

  22. Thinking Critically E-mail Privacy To what degree is the analyst responsible for advising network users and administrators about unauthorized use of network resources? What course of action, if any, should the analyst recommend to the network administrator? How might you react if you discovered that the network administrator had read your e-mail? Systems Analysis and Design for the Small Enterprise 22 Chapter 13

  23. Figure 13-15: PRC’s Peer-to-PeerLAN Upgrade Specifications Systems Analysis and Design for the Small Enterprise 23 Chapter 13

  24. Figure 13-16: PRC’s Peer-to-PeerLAN Upgrade Diagram Reference: Figure 12-17: Prototype Review Report Content Systems Analysis and Design for the Small Enterprise 24 Chapter 13

  25. Figure 13-17: PRC’s File ServerLAN Upgrade Specifications Existing System: Three stand-alone 650 MHz Pentium desktop computers, each with 128 MB of RAM, 10 GB of hard disk storage, 24X CD-ROM, Windows, and Microsoft Office Pro. One 15 ppm, 300 dpi, 8 MB RAM laser printer, with an electronic switch connected to the three microcomputers. Client Hardware: Ethernet network interface cards (3 @ $35) 105 Cat 5 twisted pair (1 box) 70 Cable connectors 10 256 MB RAM (3 @ 50) 150 4-port Cable/DSL Web Safe Router 130 Printer-server interface card 350 8 MB printer memory 50 Subtotal5,909 Tax and Shipping 600 Installation (8 hours @ $80) 640 Grand Total $7,149 Client Software: Microsoft Office Pro upgrade (3 client license) 300 Server Bundle: Dell PowerEdge 1400SC (Small-Business Server) 4,744 Intel Pentium III 1.4 GHz w/512K cache 512 MB SDRAM 15 inch monitor 36 GB hard drive 3.5 inch disk drive 48X CD-ROM Operating system: Microsoft Small Business Server 2000 UPS: APC SmartUPS 700, 700VA Tape backup unit: PowerVault 100T 20/40 G Internal Tape backup software: CA Arcserve Server Systems Analysis and Design for the Small Enterprise 25 Chapter 13

  26. Internet, Intranet, and Extranet Solutions Peer-to-peer and local area networks are confined to relatively small geographic areas. Internet, intranet, and extranet provide the potential for limitless extension of the enterprise network. Until fairly recently, these networking extensions merely provided a transporting medium for information products. Now there are powerful tools and languages that permit the analyst to distribute both data and computer processing to multiple network resources (e.g., clients, database servers), thus relieving the server’s processor of workload and reducing the volume of data transmission traffic on the network. Systems Analysis and Design for the Small Enterprise 26 Chapter 13

  27. Figure 13-18: Extranet Diagram Systems Analysis and Design for the Small Enterprise 27 Chapter 13

  28. Figure 13-19: Data-Driven Web Page Scenario Systems Analysis and Design for the Small Enterprise 28 Chapter 13

  29. Figure 13-20: Client/Server Database Model Systems Analysis and Design for the Small Enterprise 29 Chapter 13

  30. Figure 13-21: Web-Accessible Database Options Systems Analysis and Design for the Small Enterprise 30 Chapter 13

  31. THE CORNUCOPIA CASE The Cornucopia Case The Web site is the only networking technology specified in the current design. Systems Analysis and Design for the Small Enterprise 31 Chapter 13

  32. Figure 13-22: Cornucopia Windows Interface Cornucopia Information System Systems Analysis and Design for the Small Enterprise 32 Chapter 13

  33. Figure 13-23: Cornucopia Web Page Files CDMaster.htm CDNotes.htm Mlist.htm Rclasses.htm SMsg.htm Home.htm Systems Analysis and Design for the Small Enterprise 33 Chapter 13

  34. Figure 13-24: Cornucopia HTML Code (Cindex.htm) Cindex.htm <HTML> <HEAD> <TITLE>Cornucopia</TITLE> </HEAD> <! Frame definition > <! Divide the screen into two columns> <FRAMESET COLS= "200,*"> <! Divide the first column into two rows, define their source files> <FRAMESET ROWS="130,*"> <FRAME NAME="FrLogo" SRC = "Clogo.htm" MARGINWIDTH = "0" MARGINHEIGHT = "0" SCROLLING="none" NORESIZE> <FRAME NAME="FrTOC" SRC = "Cpiatoc.htm" MARGINWIDTH = "0" MARGINHEIGHT = "0"> </FRAMESET> <! Define the second column's initial source file> <FRAME NAME="FrMain" SRC = "Home.htm"> </FRAMESET> </HTML> Systems Analysis and Design for the Small Enterprise 34 Chapter 13

  35. Figure 13-25: Cornucopia JavaPot.htm (partial) <HTML> <HEAD> <TITLE>Untitled</TITLE> <SCRIPT Language = "JavaScript"> // Define global variables var QNumber = 0 var UserAns = null // Define and initialize an array function QuizArr(n) { this.length = n for (var i=1;i<=n;i++){ this[i]=0 } return this } // Define a custom object with two properties function MusicQuestion(Question,Answer){ this.Question = Question this.Answer = Answer } // Display the question, clear and set focus to the answer text object function ShowQuestion() { QNumber += 1 if (QNumber > MusicQuiz.length) { alert("Sorry, there are no more questions.") QNumber = 1 } document.GetAns.DisplayQuestion.value = (MusicQuiz[QNumber].Question) document.GetAns.UserInput.value = "" document.GetAns.UserInput.focus() } Systems Analysis and Design for the Small Enterprise 35 Chapter 13

  36. Figure 13-26: Cornucopia Project Status – Week 12 Systems Analysis and Design for the Small Enterprise 36 Chapter 13

  37. Figure 13-27: Cornucopia Project Budget – Week 12 Systems Analysis and Design for the Small Enterprise 37 Chapter 13

  38. Figure 13-28: Cornucopia Future Network Diagram Systems Analysis and Design for the Small Enterprise 38 Chapter 13

  39. Portfolio project Portfolio Project Team Assignment 13: Networking Prepare a slide show illustrating the various pages of the enterprise Web site. Prepare a brief summary of the current and potential use of networking technology in the solution to your project. Systems Analysis and Design for the Small Enterprise 39 Chapter 13

  40. Chapter Summary • The analyst must address diverse hardware and software issues: • Hardware: speed • memory • storage • Software: user interfacing • resource management • resource sharing • Networking hardware and software decisions complicate this process. Systems Analysis and Design for the Small Enterprise 40 Chapter 13

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