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SYSTEM ANALYSIS AND DESIGN - Coggle Diagram
SYSTEM ANALYSIS AND DESIGN
1) Impact of information technology
ii) INFORMATION TECHNOLOGY
combination of hardware and software products
services that companies use to manage, access,
communicate, and share information
vital asset, must be used effectively, updated
constantly, and safeguarded carefully
iii) WHO DEVELOPS INFORMATION SYSTEMS?
in house applications
software package
internet base application service
outsourcing
custom solutions
enterprise wide software stratergies
i) ROLE OF SYSTEM ANALYSIS AND DESIGN
system analysis and design
step by step process for develop the high quality IS
system analyst
plan, develop, maintain IS
2) Information system components
i) Hardware
physical layer of Information System(IS)
computer processing power will double every 18 - 24 months
ii) Software
system software
a type of computer program that is designed to run a computer's hardware and application programs.
network OS
a computer operating system (OS) that's designed primarily to support workstations, PCs and, in some instances, older terminals that are connected on a local area network (LAN).
application software
to aid the user in doing specified tasks. (Firefox, and Google Chrome, as well as Microsoft Word and Excel)
enterprise applications
a large software system platform typically designed to operate in a corporate environment such as business or government.
horizontal system
any software application that is designed to be used by many different types of users and businesses.
vertical system
is a type of software that has been designed to meet the specific needs of a particular industry or market.
legacy system
outdated computing software and/or hardware that is still in use.
iii) Data
raw material that an information system transform into useful information
iv) Processes
describe task and functions that users, managers, IT staff members perform to achieve results
v) People
user + end users = people who interact with IS, both inside and outside the company
3) System development tools and techniques
i) Modeling
system analyst can describe and simplify an information system using a set of bussiness, data, object and process models
ii) Prototyping
early working version of IS
speeds up developement process significantly
can be an extremely valuable tool
iii) Computer Aided Systems Engineering (CASE) Tools
use powerful software to help system analyst develop, maintain IS
4) System development methods
i) Structured Analyst
traditional systems development technique
uses the SDLC to plan, analyze, design, implement, support an information system
ii) Object oriented analysis
combines data and the processes that act on the
data into things called objects
Systems analysts use O-O to model real-world
business processes and operations
iii) Joint application development and rapid application development
JAD – Team based fact finding
RAD – compressed version of the entire process
iv) Others
to structured analysis and object oriented methodologies, you might encounter other systems development techniques
Microsoft Solutions Framework (MSF) documents
the experience of its own IT teams