Please enable JavaScript.
Coggle requires JavaScript to display documents.
TOPIC 6 SYSTEM ARCHITECTURE - Coggle Diagram
TOPIC 6 SYSTEM ARCHITECTURE
INTRODUCTION
The overall IT system architecture
of an organization
Key part of managing and evolving IT systems therefore the business operations of an organization
Consists:-
1) Architectures of individual systems
2) The relationships in the perspective of an organization.
System Architecture and EIS
EIS
focused internally
eliminate problems related to
security and compatibility
provide access to customers and suppliers
the layout of computer systems used to
support an organization
leads to the use of EIS in e-commerce environments
data is
distributed
exchange of data across systems can be problematic
Type of EIS
Vertical
3 architectural layers,
application architecture layer
technology architecture layer
business architecture layer
Horizontal
3 integration
Enterprise application integration
Middleware integration
Enterprise application integration
Open Source EIS
EIS has been developed:-
Saas - a service that clients can access via the Internet.
OSS - allowed small and medium-sized business access to EIS by:-
increased adaptability
decrease reliance on a single supplier
reduced cost
SOA - a paradigm for organizing and utilizing distributed
capabilities
To support the small to medium-sized business sector
System Design
Prototyping Model
process of developing a small working
model of a program component or system
Involves building a small-scale mock-up
system,
low investment and low structure
Waterfall Model
each step
follows its predecessor in sequence
Test:-- 1)Validation
2)Verification
Spiral Model
Uses iterative prototypes
Involving software projects with high
levels of risk
External EIS Operation and Support
Application Service Providers (ASP)
Outsourcing