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14 Cards in this Set
- Front
- Back
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What is a system?
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A purposeful collection of inter-relate components working together to achieve some common objective.
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System caegories
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Technical computer -based Systems
Systems that include hardware and software Socio-techical systems Systems that include technical systems but also operational processes and people who use and interact with the technical system. |
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Software is Flexible
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Software is often changed (too much)
New version can be downloaded and distributed Hardware problems can be solved with software |
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Characteristics of socio-tehnical systems
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Emergent properties: properties of the system of a whole
that depend on the system components an their relationships. Non-deterministic: Inconsistency of input to output. Complex relationships with organizational objectives: Different views and objective of systems and management |
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Types of emergent property
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Functional property:
These appear when all the pats of a system work together to achieve some objective. Non-Functional properties: Reliability, performance, safety and security relate to the behavior of the system in its operational environment. |
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Systems Engineering
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Specifying, designing, implementing, validating, deploying, and maintaining socio-technical systems.
Hardware, software and processes. |
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Systems Engineering process (V-cycle)
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Inter Disciplinary Involvement
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System Objectives
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Should define why a system is being procured for a particular environment.
Functional objective: Fire an alarm intruder system Organizational objective: Flow of normal functioning of work is carried out. |
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System Modelling
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An architectural model presents an abstract view of the sub-systems making up a system. (Block Diagram)
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Legacy Systems
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Existing systems which must be maintained.
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System Procurement
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Acquiring a system for an organization to meet some need.
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Legacy system componenes
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Hardware
Support software Application software Application data Business Processes Business policies and rules |
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legacy System Laters
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Business processes
=> Application software => Support software => Hardware |
