Systems
Analysis and Design
Information System Components
Hardware
Everything in the physical layer of the information
system
Moore’s Law accurately predicted that computer
processing power would double every 18 to 24
months
Software
Legacy systems
- Windows 10 - Apple IOS - Android - Ubuntu - CentOS - Red hat Enterprise Linux - macOS Sierra - Apple OS X El Capitan - Debian - Windows 8
Vertical system
RazorSync-Chemical Safety Software-LMN
Horizontal system
NetSuite-Intacct- Acumatica-Microsoft Dynamics.
Enterprise applications
spreedsheet(excel)-ms word-photoshop
Application software
Internet Browsers-Music Software-Communication Software-The Microsoft Suite
Network operating system
Microsoft Windows Server-UNIX Operating System-Linux Operating System
System software
Android-Anti virus
-Disk formatting-Computer language translators
Data
The raw material
that an
information
system
transforms into
useful
information
Processes
Describe the tasks and business functions that
users, managers, and IT staff members perform to
achieve specific results
People
Users, or end users, are the people who interact
with an information system, both inside and outside
the company
System development methods and techniques
Methods
Structured Analysis
traditional systems development technique
Uses the systems development life cycle to plan, analyze,
design, implement, and support an information system
Object-oriented (O-O) 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
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Joint Application Development and
Rapid Application Development
JAD – Team based fact finding
RAD – compressed version of the entire process
Other development methodologies
In addition to structured analysis and O-O
methodologies, you might encounter other systems
development techniques
Microsoft Solutions Framework (MSF) documents
the experience of its own IT teams
Techniques and tools
Systems analysts must know how to use
a variety of techniques such as modeling,
prototyping, and computer-aided
systems engineering tools to plan,
design, and implement information
systems
Systems analysts work with these tools in
a team environment
Modeling
A systems analyst can describe and simplify an
information system by using a set of business, data,
object, and process models.
Prototyping
Early working version of an information system
Speeds up the development process significantly
Can be an extremely valuable tool
Computer-Aided Systems Engineering
(CASE) Tools
CASE uses powerful software to help systems
analysts develop and maintain information systems