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IT System Evaluation
Overview
- How to Evaluate (metrics)- Requirements- A list of likely NFRs (loosely defined)- NFRs and IT Infrastructure- Overall Performance
- A system is evaluated using- metrics,- non-functional attributes,- What qualitites a system HAS when implemented- non-functional requirements (NFR).- What qualities a system SHOULD HAVE as a design goal
- A metric is a general way of measuring some characteristic, with the intention of using such measurements to- compare competing solutions, or- change ('optimise') systems in some way in an organised manner.
- Functional:- Characteristics of the system being designed- Every system is defined by functional requirements
- Non-functional: ("Qualities")- Used as a means of comparing multiple systems purporting to do the same thing.- Allows you to choose.- Describe the qualitative behavior of a system- Essential in IT infrastructure architectures
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