An introduction to System Analysis and Design

1. SYSTEMS ANALYIS and DESIGN

2. Chapter 1
Introduction to
Systems Analysis
and Design

3. • Systems Analysis and Design (SAD) is a generic term for
describing methodologies for developing IT systems.
step-by-step process for developing
high-quality information systems.
An information system combines
information technology, people, and data to support business
requirements.
For example, information systems handle daily business
transactions, improve company productivity, and help
managers make sound decisions.

4. • systems analyst is the person who utilizes SAD
principles to integrate technology into an
organization.
• Systems Development
Business information systems are developed by
people who are technically qualified,
business-oriented, and highly motivated. Successful
developers also must be good
communicators with strong analytical and critical
thinking skills.

5. • Who Develops Information Systems?
Traditionally, a company either developed its own
information systems, called in-house
• applications, or purchased systems called
software packages from outside vendors.
Today, the choice is much more complex. Options
include Internet-based application
services, outsourcing, custom solutions from IT
consultants, and enterprise-wide software
strategies.

6. • A system is a set of related components that
produces specific results.

7. • Every system requires input data. For example,
your computer
• receives data when you press a key or click a
menu command. In
• an information system, data consists of basic
facts that are the
• system’s raw material. Information is data
that has been transformed
• into output that is valuable to users.

8. • Software
Software refers to the programs that control the
hardware and produce the desired information
or results.
Software consists of system software and
application
software.

9. • Application software consists of programs
that support day-to-day business functions
and provide users with the information they
require
• System software manages the hardware
components, which can include a single
workstation or a global network with many
thousands of clients

11. Top Managers
Top managers develop long-range plans,
called strategic plans, which define the
company’s
overall mission and goals

12. • Middle Managers and Knowledge
Workers
Just below the top management level, most
companies have a layer of middle managers
and knowledge workers
provide direction, necessary resources, and
performance feedback to supervisors and team
leaders

13. • Supervisors and Team Leaders
Supervisors, often called team leaders, oversee
operational employees and carry out
day-to-day functions.
• Operational Employees
Operational employees include users who rely
on TP systems to enter and receive data
they need to perform their jobs.