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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 l.jpg
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 l.jpg
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


The pc solution l.jpg
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.

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for the Small Enterprise

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Chapter 13


Figure 13 1 evolution of the pc microprocessor l.jpg
Figure 13-1: Evolution of the PC Microprocessor

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Chapter 13


Figure 13 2 pc hardware diagram l.jpg
Figure 13-2: PC Hardware Diagram

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Chapter 13


Figure 13 3 critical hardware performance issues and acronyms l.jpg
Figure 13-3: Critical Hardware Performance Issues and Acronyms

Systems Analysis and Design

for the Small Enterprise

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Chapter 13


Figure 13 4 pc operating system diagram l.jpg
Figure 13-4: PC Operating System Diagram

Systems Analysis and Design

for the Small Enterprise

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Chapter 13


Figure 13 5 critical system software issues l.jpg
Figure 13-5: Critical System Software Issues

Systems Analysis and Design

for the Small Enterprise

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Chapter 13


Figure 13 6 system environment l.jpg
Figure 13-6: System Environment

Users

Information

Systems

4GL Products

System Software

System Hardware

Systems Analysis and Design

for the Small Enterprise

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Chapter 13


Figure 13 7 windows xp user accounts dialog boxes top middle l.jpg
Figure 13-7: Windows XP User Accounts Dialog Boxes(top & middle)

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for the Small Enterprise

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10

Chapter 13


Figure 13 7 windows xp user accounts dialog boxes bottom l.jpg
Figure 13-7: Windows XP User Accounts Dialog Boxes(bottom)

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Chapter 13


Figure 13 8 adding prc to the start menu and as a shortcut icon l.jpg
Figure 13-8: Adding PRC to the Start Menuand as a Shortcut Icon

Systems Analysis and Design

for the Small Enterprise

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Chapter 13


Figure 13 9 information system security l.jpg
Figure 13-9: Information System Security

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for the Small Enterprise

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Chapter 13


Networking solutions l.jpg
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

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Chapter 13


Figure 13 10 network diagram l.jpg
Figure 13-10: Network Diagram

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for the Small Enterprise

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Chapter 13


Figure 13 11 wireless lan diagram l.jpg
Figure 13-11: Wireless LAN Diagram

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for the Small Enterprise

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Chapter 13


Tco and the net pc l.jpg

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.

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for the Small Enterprise

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Chapter 13


Figure 13 12 file server diagram l.jpg
Figure 13-12: File Server Diagram

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for the Small Enterprise

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Chapter 13


Figure 13 13 database server diagram l.jpg
Figure 13-13: Database Server Diagram

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Chapter 13


Figure 13 14 network productivity products l.jpg
Figure 13-14: Network Productivity Products

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Chapter 13


Applications development without programming l.jpg

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.

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for the Small Enterprise

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Chapter 13


E mail privacy l.jpg

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?

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Chapter 13


Figure 13 15 prc s peer to peer lan upgrade specifications l.jpg
Figure 13-15: PRC’s Peer-to-PeerLAN Upgrade Specifications

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for the Small Enterprise

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Chapter 13


Figure 13 16 prc s peer to peer lan upgrade diagram l.jpg
Figure 13-16: PRC’s Peer-to-PeerLAN Upgrade Diagram

Reference: Figure 12-17: Prototype Review Report Content

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for the Small Enterprise

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Chapter 13


Figure 13 17 prc s file server lan upgrade specifications l.jpg
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

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for the Small Enterprise

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Chapter 13


Internet intranet and extranet solutions l.jpg
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.

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Chapter 13


Figure 13 18 extranet diagram l.jpg
Figure 13-18: Extranet Diagram

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Chapter 13


Figure 13 19 data driven web page scenario l.jpg
Figure 13-19: Data-Driven Web Page Scenario

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Chapter 13


Figure 13 20 client server database model l.jpg
Figure 13-20: Client/Server Database Model

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Chapter 13


Figure 13 21 web accessible database options l.jpg
Figure 13-21: Web-Accessible Database Options

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Chapter 13


The cornucopia case l.jpg

THE CORNUCOPIA CASE

The Cornucopia Case

The Web site is the only networking technology specified in the current design.

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Chapter 13


Figure 13 22 cornucopia windows interface l.jpg

Figure 13-22: Cornucopia Windows Interface

Cornucopia Information System

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Chapter 13


Figure 13 23 cornucopia web page files l.jpg

Figure 13-23: Cornucopia Web Page Files

CDMaster.htm

CDNotes.htm

Mlist.htm

Rclasses.htm

SMsg.htm

Home.htm

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Figure 13 24 cornucopia html code cindex htm l.jpg

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>

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Chapter 13


Figure 13 25 cornucopia javapot htm partial l.jpg

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() }

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Chapter 13


Figure 13 26 cornucopia project status week 12 l.jpg

Figure 13-26: Cornucopia Project Status – Week 12

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for the Small Enterprise

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Chapter 13


Figure 13 27 cornucopia project budget week 12 l.jpg

Figure 13-27: Cornucopia Project Budget – Week 12

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Chapter 13


Figure 13 28 cornucopia future network diagram l.jpg

Figure 13-28: Cornucopia Future Network Diagram

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for the Small Enterprise

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Chapter 13


Portfolio project l.jpg

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.

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for the Small Enterprise

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Chapter 13


Chapter summary l.jpg
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.

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for the Small Enterprise

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Chapter 13