Software Engineering (3rd ed.), By K.K Aggarwal & Yogesh Singh

1094 Pages·2009·6.7 MB·English

Software Engineering (3rded.), By K.K Aggarwal& YogeshSingh, Copyright ©New Age International Publishers, 2007 1
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Change in nature & complexity of software
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Concept of one “guru” is over
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We all want improvement
Ready for change
Software Engineering (3rded.), By K.K Aggarwal& YogeshSingh, Copyright ©New Age International Publishers, 2007 2
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Software industry is in Crisis!
success
16%
failure
31%
over budget
53%
Source: The Standish Group International, Inc. (CHAOS research)
Software Engineering (3rded.), By K.K Aggarwal& YogeshSingh, Copyright ©New Age International Publishers, 2007 3
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This is the
Successful –
Completed 28%
SORRY state
Late, over
budget, and/or
of Software with features
missing – 49%
Engineering
Cancelled –
Today!
23%
• Data on 28,000 projects
completed in 2000
Software Engineering (3rded.), By K.K Aggarwal& YogeshSingh, Copyright ©New Age International Publishers, 2007 4
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As per the IBM report, “31%of the project get
cancelled before they are completed, 53% over-
run their cost estimates by an average of 189%
and for every 100 projects, there are 94 restarts”.
Software Engineering (3rded.), By K.K Aggarwal& YogeshSingh, Copyright ©New Age International Publishers, 2007 5
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Hw cost
Sw cost
Year
1960
1999
Relative Cost of Hardware and Software
Software Engineering (3rded.), By K.K Aggarwal& YogeshSingh, Copyright ©New Age International Publishers, 2007 6
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• Unlike Hardware
– Moore’s law: processor speed/memory capacity doubles
every two years
Software Engineering (3rded.), By K.K Aggarwal& YogeshSingh, Copyright ©New Age International Publishers, 2007 7
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Managers and Technical Persons are asked:
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Why does it take so long to get the program finished?
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Why are costs so high?
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Why can not we find all errors before release?
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Why do we have difficulty in measuring progress of software
development?
Software Engineering (3rded.), By K.K Aggarwal& YogeshSingh, Copyright ©New Age International Publishers, 2007 8
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• Larger problems,
• Lack of adequate training in software engineering,
• Increasing skill shortage,
• Low productivity improvements.
Software Engineering (3rded.), By K.K Aggarwal& YogeshSingh, Copyright ©New Age International Publishers, 2007 9
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Ariane 5
It took the European Space Agency 10
years and $7 billion to produce Ariane 5,
a giant rocket capable of hurling a pair of
three-ton satellites into orbit with each
launch and intended to give Europe
overwhelming supremacy in the
commercial space business.
The rocket was destroyed after 39 seconds
of its launch, at an altitude of two and a
half miles along with its payload of four
expensive and uninsured scientific
satellites.
Software Engineering (3rded.), By K.K Aggarwal& YogeshSingh, Copyright ©New Age International Publishers, 2007 10