Paper

White paper on Unit examination
R.Venkat Rajendran, Director, Deccanet Designs Ltd.
Introduction
The world has started to affirm increasingly on softwargon that is becoming more(prenominal) and more
complex. straight off software product program is everywhere - part of every system or machine that we use in
daily life. Software Quality and reliability have become an important concern of the
software industry. epoch improved and formal software development processes help
avoid more and more defects, a large follow of defects are heretofore left in software. In one of
historys well-known bugs, the entire long distance of AT&T was down for nine hours.
The melt down was finally traced to a single line of label that could have been best
detected by some effective unit testing. Modern wireless handsets are recent examples of
the problem faced by software aspirationers. Beizer argues that the number of bugs left
behind after a software engineer delivers his code to others is still too high for comfort.
While improved design techniques try to avoid defects, effective testing continues to play
an important position in removing defects left behind and is the cornerstone of the Software
Quality self-assertion activity.




Increasing complexity and Reducing time to market
The complexity of software is increasing sharply while the time to market is growing
equally fast. For wireless mobile handsets used to have a a few(prenominal) tens of thousands of code a
few years back and they now incorporate a few millions line of code. But due to competitive
bosom the development time for such complexity has comedown by 50%.
Consequently, the 3G handsets that were released in Japanese market had to be recalled
due to software defects. Better early phase testing is a etymon that can address this
problem well.
interrogatory takes significant effort
Testing accounts for significant part of the software development lifecycle. According to
Boris Beizer Testing and debugging costs range from 50% to 80% of the cost of
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