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Define the method of Direct changeover
With this technique, old system is stopped and new system is used Straight away;
- This method can be disastrous if new system fails at any point
- Though, benefits are immediate and less time is wasted
- Costs are reduced (just one system in use so save on staff costs)
- Less likelihood of a malfunction as the new system would have been fully tested
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how to start building software
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State Lehman's First law A program that is used in real world environment of necessity must change or become progressively less useful in that environment.
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What problems arise if two modules have high coupling? Coupling means the interconnection of dissimilar modules with each other or we can say, it tells about the interrelations
Configuration Management: Because of several reasons, software changes during its life cycle. As a result of the changes made, many versions of the software exist at one time.
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