HRM 3450 Lecture Notes - Lecture 19: Network Architecture, Computer Hardware, Word Processor
5 May 2018
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HRM 3450 Tutorial 19 Notes – Implementation of IT System
Introduction
• The analysis, design, and implementation of IT systems must take place at different
levels of detail and frequently require collaboration among many analysts and
designers.
• This corresponds well with the ability to decompose systems into components,
hierarchically, which allows us to concentrate at the appropriate levels of detail during
each step along the way.
• This approach is known as a top-down approach.
• The top-down approach allows us to focus on the specific areas of interest without the
distraction of details that are irreleant for the leel that e’re studying.
• In this way, a system architect can analyze and study the IT system as a whole,
encapsulating the computer systems, software systems, network architecture, and Web
architecture that represent components, and focusing instead on the large picture
• The purpose of each component and the requirements for the interfaces and linkages
that connect and integrate them.
• With the IT system architecture firmly established, we can consider the individual
business functions, computer systems, and networks that will link them together.
• For IT system analysis, this is often sufficient, at least superficially, assuming that the
system architects actually understand the conditions and constraints imposed by details
at the lower levels.
• Although there are other, equally valid, approaches to IT system analysis and design,
and many other important considerations as well, this approach suits the purposes of
well.
• It allows us to establish general requirements for IT systems and then to show how the
specific capabilities.
• Characteristics of computer hardware, operating systems, networks, and data fulfill
those requirements.
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