Software Reliability

Software Reliability

,Software Reliability

, Software Reliability

Basic Concepts
There are three phases in the life of any hardware component i.e.,
burn-in, useful life & wear-out.
In burn-in phase, failure rate is quite high initially, and it starts
decreasing gradually as the time progresses.
During useful life period, failure rate is approximately constant.

Failure rate increase in wear-out phase due to wearing out/aging of
components. The best period is useful life period. The shape of this
curve is like a “bath tub” and that is why it is known as bath tub
curve. The “bath tub curve” is given in Fig.7.1.



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, Software Reliability




Fig. 7.1: Bath tub curve of hardware reliability.


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