Software engineering

2. Objectives
 Introduce software engineering and explain its
importance
 Develop a broad understanding of the software
engineering domain
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3. Questions
 What makes software so important?
 A software product’s impacts in our life
Behind the Scene
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4. General Observations
 Software is used by virtually everyone in society either
directly or indirectly.
 The economies of the world are depend on software.
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5. Software & Software
engineering Definition
 Software series of instructions that directs a
computer to perform specific tasks or operations.
 Software engineering is the study and an
application of engineering to the design,
development, implementation and maintenance of
software in a systematic method.
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6. Software Types
 Generic - developed to be sold to a range of different
customers.
>>PC software such as Word or Excel
 Custom - developed for a single customer according
to their specification.
 Cooperative Solutions
>>Starting with generic system and customizing it to
the needs of a particular customer.
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7. 7
 Cooperative Solutions:
 Custom :
 Generic
Examples

8. Software Process Model
 Process Model : A simplified representation of a
software process, presented from a specific
perspective.
 Examples of process perspectives are:
 Workflow - sequence of activities
 Data-flow - information flow
 Role/action - who does what
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9. connect apps and actions together to automate things
you do on your device. To build a workflow, just drag
and drop together a series of actions.
9Software Process Model
Workflow perspective(simple one) :

10. Software Development
Process
 A set of activities whose goal is the development or
evolution of software.
 Generic activities in all software processes are:
 Specification - what the system should do and its
development constraints.
 Development - production of the software system.
 Validation - checking that the software is what the
customer wants.
 Evolution - changing the software in responses to
changing demands.
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11. Attributes of a Good
Software
 Maintainability
 Software must evolve to meet changing
needs;
 Dependability
 Software must be trustworthy; e.g.
reliability, security, safety.
 Efficiency
 Software should not make wasteful use of
system resources;
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12. Attributes of a Good
Software
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Cost
Performance

13. Source:
 http://www.cs.washington.edu/444/
 National Science Foundation
www.nsf.gov
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14. THE END