Software Engineering Fundamentals
SOFTWARE
ENGINEERING
UNIT – I (Chapter-1)
Introduction to Software Engineering
Text Book: Software Engineering, A practitioner’s approach
Roger s. Pressman 6
th
Edition -McGraw-Hill
Outline
■
Software
■
Software
Characteristics
■
Changing
Nature
of
Software
■
Legacy
Software
■
Software
Evolution
■
Software
Myths
■
Software
is
○
Instructions(Computer
Programs)
that
when
executed
provide
desired
features,
functions
and
performance
○
Data
Structures
that
enable
the
programs
to
adequately
manipulate
information
○
Documents
that
describe
the
operation
and
use
of
the
programs
Software
■
Software
is
a
product
○
Delivers
computing
potential
○
Produces,
manages,
acquires,
modifies,
displays
and
transmits
information
■
Software
is
a
vehicle
for
delivering
a
product
○
Supports
or
directly
provides
system
functionality
○
Controls
other
programs
(Eg:
an
Operating
System)
○
Effects
communications
(Eg:
Networking
Software)
○
Helps
build
other
software
(Eg:
Software
Tools)
Software’s
Dual
Role
Software
Characteristics
•
Software
is
Engineered
or
Developed,
it
is
not
manufactured
in
the
classical
sense
•
Software
“
doesn’t
wear
out
”
•
Although
industry
is
moving
towards
Component-
based
construction
,
most
software
continues
to
be
custom
built
Failure
curve
for
Software
Changing
Nature
of
Software
•
System
software
•
Application
software
•
Engineering/scientific
software
•
Embedded
software
•
Product-line
software
•
Web-applications
•
Artificial
Intelligence
software
•
Netsourcing
•
Open
source
•
Also
…
•
Data
mining
•
Cloud
Computing
•
Software
for
nanotechnologies
Legacy
Software
Legacy
Software
Systems
were
developed
decades
ago
and
have
been
continually
modified
to
meet
changes
in
business
requirements
and
computing
platforms.
Why
must
it
change?
■
software
must
be
adapted
to
meet
the
needs
of
new
computing
environments
or
technology
■
software
must
be
enhanced
to
implement
new
business
requirements
■
software
must
be
extended
to
make
it
interoperable
with
other
more
modern
systems
or
databases
■
software
must
be
re-architected
to
make
it
viable
within
a
network
environment
Software
Myths
Beliefs
about
software
and
the
process
used
to
build
it.
✔
Management
Myths
✔
Customer
Myths
✔
Practitioner’s Myths
Software
Myths
Beliefs
about
software
and
the
process
used
to
build
it.
✔
Management
Myths
✔
Customer
Myths
✔
Practitioner’s Myths
Any questions?
Thank you
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Software engineering involves the development of instructions, data structures, and documents to create functional computer programs. It plays a dual role as a product and a vehicle for delivering computing potential. The changing nature of software encompasses various types such as system, application, embedded, and artificial intelligence software. Legacy software systems require adaptation to meet new business needs and technological advancements.
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Presentation Transcript
SOFTWARE ENGINEERING UNIT I (Chapter-1) Introduction to Software Engineering Text Book: Software Engineering, A practitioner s approach Roger s. Pressman 6th Edition -McGraw-Hill
Outline Software Software Characteristics Changing Nature of Software Legacy Software Software Evolution Software Myths
Software Software is Instructions(Computer Programs) that when executed provide desired features, functions and performance Data Structures that enable the programs to adequately manipulate information Documents that describe the operation and use of the programs
Softwares Dual Role Software is a product Delivers computing potential Produces, manages, acquires, modifies, displays and transmits information Software is a vehicle for delivering a product Supports or directly provides system functionality Controls other programs (Eg: an Operating System) Effects communications (Eg: Networking Software) Helps build other software (Eg: Software Tools)
Software Characteristics Software is Engineered or Developed, it is not manufactured in the classical sense Software doesn t wear out Although industry is moving towards Component- based construction, most software continues to be custom built
Changing Nature of Software System software Application software Engineering/scientific software Embedded software Product-line software Web-applications Artificial Intelligence software Netsourcing Open source Also Data mining Cloud Computing Software for nanotechnologies
Legacy Software Legacy Software Systems were developed decades ago and have been continually modified to meet changes in business requirements and computing platforms. Why must it change? software must be adapted to meet the needs of new computing environments or technology software must be enhanced to implement new business requirements software must be extended to make it interoperable with other more modern systems or databases software must be re-architected to make it viable within a network environment
Software Myths Beliefs about software and the process used to build it. Management Myths Customer Myths Practitioner s Myths
Software Myths Beliefs about software and the process used to build it. Management Myths Customer Myths Practitioner s Myths
