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Planning Information Technology Architectures

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Data access and data sharing? Creativity? 12-12. Reengineering Legacy Systems. Reverse engineering. Upsizing/Downsizing/Rightsizing. BPR ... – PowerPoint PPT presentation

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Title: Planning Information Technology Architectures


1
Planning Information Technology Architectures
2
Planning Information Technology Architectures
  • An IT architecture consists of the combination
    of hardware, software, data, personnel, and
    telecommunications elements within an
    organization, along with procedures to employ
    them.

3
Centralized Architecture
4
Noncentralized Architecture
  • Noncentralized computing architectures are
    either decentralized or distributed.

5
Decentralized Computing
  • Decentralized computing breaks centralized
    computing into functionally equivalent parts,
    with each part essentially a smaller, centralized
    subsystem.

6
Distributed Computing
  • Distributed computing breaks centralized
    computing into many computers that may not be
    (and usually are not) functionally equivalent.

7
Client / Server Architecture
  • Client
  • Server
  • Specialization
  • Client / server responsibilities

8
Client
  • A client is generally agreed to be any system or
    process that can request and make use of data,
    services, or other systems provided by the server.

9
Server
  • A server is generally agreed to be any system or
    process that provides data, services, or access
    to other systems for clients, most often for
    multiple clients simultaneously (as a shared
    resource).

10
Choosing Among Architecture Options
  • Business goals should guide
  • Both a Managerial and Technological issue
  • Centralized computing
  • Economies of scale
  • Distributed computing
  • Scope, Flexibility, Redundancy
  • Blending centralized and distributed computing
  • Most modern architectures mix the two

11
End-User Computing Architecture Issues
  • Key issue to provide architecture support for
    a division of responsibilities agreed on by IS
    and user groups
  • What is important?
  • Control of data?
  • Control of costs?
  • Data access and data sharing?
  • Creativity?

12
Reengineering Legacy Systems
  • Reverse engineering
  • Upsizing/Downsizing/Rightsizing
  • BPR
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