Information System Development - Discovering Computers Fundamentals - Lecture Slides, Slides of Computer Fundamentals

Download Information System Development - Discovering Computers Fundamentals - Lecture Slides and more Slides Computer Fundamentals in PDF only on Docsity!

Information System Development

docsity.com

Objectives Overview

Discuss the importance of

project management,

feasibility assessment,

documentation, and data

and information gathering

techniques

Discuss the purpose of each

system development phase

Differentiate between low-

level languages and

procedural languages

Identify the benefits of

object-oriented

programming languages and

program development tools

See Page 417

for Detailed Objectives docsity.com

System development is a set of activities used to build an information system A system is a set of components that interact to achieve a common goal An information system ( IS ) is a collection of hardware, software, data, people, and procedures that work together to produce quality information System development activities are grouped into phases , and is called the system development life cycle ( SDLC ) Page 418

docsity.com

Page 418

Figure 11- 1 docsity.com

• System development should involve representatives from each department in which the proposed system will be used Page 419

Figure 11- 2 docsity.com

• Project management is the process of planning, scheduling, and then controlling the activities during system development
• To plan and schedule a project efficiently, the project leader identifies: Page 420 Project scope Required activities Time estimates for each activity Cost estimates for each activity Order of activities Activities that can take place at the same time

docsity.com

Pages 420 - 421 Figure 11-3b Click to view Web Link, click Chapter 11, Click Web Link from left navigation, then click PERT Charts below Chapter 11 A PERT chart also can be used for planning and scheduling time

docsity.com

• Feasibility is a measure of how suitable the development of a system will be to the organization Page 421 Operational feasibility Schedule feasibility Technical feasibility Economic feasibility

docsity.com

• During system development, members of the project team gather data and information using several techniques Pages 422 - 423 Figure 11- 4 Review documentation Observe Survey Interview JAD Sessions Research

docsity.com

A user may request a new or modified system Organizations may want to improve hardware, software, or other technology Situations beyond an organization’s control might require a change Management might mandate a change A user may request a new or modified information system using a request for system services or a project request Page 423

docsity.com

• The planning phase for a project begins when the steering committee receives a project request
• Four major activities are performed: Page 425

Review and

approve the

project requests

Prioritize the

project requests

Allocate

resources

Form a project

development

team

docsity.com

• The analysis phase consists of two major activities: Pages 425 - 427 Conduct a preliminary investigation
• Determines and defines the exact nature of the problem or improvement
• Interview the user who submitted the request Perform detailed analysis
• Study how the current system works
• Determine the users’ wants, needs, and requirements
• Recommend a solution

docsity.com

• The system proposal assesses the feasibility of each alternative solution
• The steering committee discusses the system proposal and decides which alternative to pursue Pages 427 - 428 Packaged software Custom software Outsourcing Click to view Web Link, click Chapter 11, Click Web Link from left navigation, then click Vertical Market Software below Chapter 11

docsity.com

• The design phase consists of two major activities Page 428 Acquire hardware and software Develop all of the details of the new or modified information system

docsity.com