This document introduces software engineering and its importance. It defines software as a series of instructions that direct a computer to perform tasks, and software engineering as the systematic study and application of engineering principles to software design, development, implementation and maintenance. The document also discusses different types of software, software process models, the generic activities in a software development process, and attributes of good quality software such as maintainability, dependability, efficiency and cost/performance.

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