Telecommunications networks like the Internet, intranets, and extranets have become essential to the successful operations of all types of organizations and their computer-based information systems

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Systems analysis
Information System Components
Network Resources
Telecommunications networks like the Internet, intranets, and extranets have
become essential to the successful operations of all types of organizations and their
computer-based information systems. Telecommunications networks consist of
computers, communications processors, and other devices interconnected by
communications media and controlled by communications software. The concept
of Network Resources emphasizes that communications networks are a
fundamental resource component of all information systems.
Network resources include:
• Communications media: such as twisted pair wire, coaxial cable, fiber-
optic cable, microwave systems, wireless signal and communication
satellite systems.
• Network support: This generic category includes all of the people,

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Systems analysis
hardware, software, and data resources that directly support the operation
and use of a communications network. Examples include communications
control software such as network operating systems and Internet packages.
Figure 1.4. Components Information Systems in process

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Systems analysis
Systems analysis
Systems analysis is the dissection of a system into its component pieces for
purposes of studying how those component pieces interact and work. Structured
analysis was one the first formal strategies developed for systems analysis of
information systems and computer applications. The models are structured pictures
that illustrate the processes, inputs, outputs, and files required to respond to events.
Structured analysis introduced an overall strategy that has been adopted by many
of the other techniques – model-driven development. A model is a representation
of reality. Just as ‘a picture is worth a thousand words,’ most models use pictures
to represent reality. Model-driven development techniques emphasize the drawing
of models to define requirements and system designs. The model becomes the
design blueprint for constructing the final system.
Figure 2.1. Systems model

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Systems analysis
System Analyst
System Analyst is a specialist who studies the problems and needs of an
organization to determine how people, data, processes, and information
technology can best accomplish improvements for the business.
System analyst understand both business and computing. They study both
business problems and opportunities and then transform business and information
requirements into specification for information systems that will be implemented
by various technical specialists including computer programmers.
System analyst initiates changes within an organization. Every new system
changes the business.

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Systems analysis
System analyst is basically a problem solver. Problems may be either real or
anticipated that require corrective action.
Skills to be possessed by System Analyst
An analyst must possess various skills to effectively carry out the job. They may
be divided into 2 categories — interpersonal and technical skills. Interpersonal
skills deal with relationship and the interface of the analyst with people in
business. They are useful in establishing trust and resolving conflicts. Technical
skills focus on procedures and techniques for operation analysis, system analysis
and computer science.