Information Support Decision

1. Information Systems
Development (ISD)
Lecture 1:
Introduction To Systems Development

2. Course Description
• Systems Analysis and Design is the art of
problem solving.
• Scientific Methodology of Thinking
• Albert Einstein “Imagination is more
important than knowledge"

4. System Definition
system is a group of interconnected, integrated,
interrelated components (Sub-systems with
specific relationships) working together towards
achieving a common objective by accepting
inputs and producing outputs through an
organized transformation process under specific
regulations.

6. Information Systems
An arrangement of people,
data, processes,
communications, and
information technology that
interact to support and
improve day-to-day
operations in a business, as
well as support the problem-
solving and decision-making
needs of management and
users.

11. • TRANSACTION PROCESSING SYSTEM (TPS)
• DECISION SUPPORT SYSTEM (DSS)
• EXPERT SUPPORT SYSTEM (ESS)
• MANAGEMENTINFORMATION SYSTEM(MIS)
• EXECUTIVE SUPPORT SYSTEM (ESS)
• OTHER IS (OFFICE SUPPORT SYSTEM,
KNOWLEDGE WORK SYSTEM

12. What Is Systems Development?
Systems development is the process of taking a
set of business requirements and, through a
series of structured stages, translating these into
an operational IT system.

13. The main stages of systems development
The stages vary according to the development approach being used,
‘Lifecycle types and their rationales’, including:
a feasibility study, to see if the project is worth while;
requirements engineering to analyse the business need and specify
the users’ requirements;
design of the system to meet the users’ needs;
development of the software needed to meet the requirements;
testing of the software;
implementation of the solution

14. Systems development in a wider context

15. The systems development life cycle (SDLC)
• The systems development life cycle (SDLC) is the
process of determining how an information
system (1S) can support business needs,
designing the system, building it, and delivering it
to users.
• The key person in the SDLC is the systems analyst,
who analyzes the business situation, identifies
the opportunities for improvements and designs
an is to implement the improvements.

16. The systems development life cycle (SDLC)
• Each of the sequential SDLC phases is
composed of consecutive steps and activities,
which rely on appropriate tools and
techniques (models & templates) that
produce deliverables(specific technical
documents that explain various elements of
the system).

17. Who participates in data analyst