Case Tools

3/3/2011

Software Quality Management
Unit – 3

G. Roy Antony Arnold
Asst. Professor / CSE

GRAA

• Computer‐Aided Software Engineering (CASE)
is the scientific application of a set of tools
and methods to a software system which is
meant to result in high‐quality, defect‐free,
and maintainable software products.
• CASE tools automate methods for designing,
documenting, and producing structured
computer code in the desired programming
language.

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3/3/2011

• Architecture Management
– Model, design, and rapidly build Software, Systems, and
Computer Application Programs.
p pp g
• Change and Release Management
– Improve software delivery and lifecycle traceability, from
requirements through deployment.
• Software Development Management
– Align projects for improved productivity and predictability.
• Q lit M
Quality Management
t
– Ensure software functionality, reliability and performance
throughout development and production.

GRAA

• CASE software supports the software process
activities such as requirement engineering,
design, program development and testing.
design program development and testing
• Therefore, CASE tools include design editors,
data dictionaries, compilers, debuggers, system
building tools, etc.
• The term CASE was originally coined by software
company Nastec Corporation of Southfield,
company Nastec Corporation of Southfield
Michigan in 1982 with their original integrated
graphics and text editor GraphiText

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3/3/2011

• Supply basic functionality, do routine tasks
automatically
– Be able to support editing of code in the particular
bl f h l
programming language, supply refactoring tools
• Enhance productivity
– Generate code pieces automatically
• Increase software quality
• Intuitive use
Intuitive use
• Integration with other tools
– For example, code editor works with code repository

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• They classified as Upper, Lower and Integrated CASE tools.
• Upper CASE Tools support strategic planning and construction
of concept‐level products and i
f tl l d t d ignore th d i aspect, such
the design t h
as ER diagrams, Data flow diagram, Structure charts,
Decision Trees, Decision tables, etc. E.g. Excelerator
• Lower CASE Tools concentrate on the back end activities of
the software life cycle, such as physical design, debugging,
construction, testing, component integration, maintenance,
reengineering and reverse engineering. E T l
i i d i i E.g. Telon
• Integrated CASE Tools aim to support the whole development
cycle. E.g. IEF (Information Engineering Facility)

GRAA

Requirement Operation &
System Design Coding Testing
Analysis Maintenance

Integrated CASE Tools (ICASE)
e.g. IEF

Upper CASE / Front End Lower CASE / Back End
e.g. Excelerator e.g. Telon
pp
Upper CASE Mid CASE /
Lower CASE / Back End

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• It is also called as front end CASE Tools
• They assist in requirement analysis & design
They assist in requirement analysis & design
• They may be tied to a specific methodology or
may allow the use of the user’s own
methodology.
• Example:
p
• These tools are associated with analysis and
design methodologies such as SAM or SSADM

GRAA

• The typical responsibilities of an UpperCASE Tool are to
support the following tasks:
– Requirement Analysis:
Requirement Analysis:
• Application Visioning
• Requirements Reuse
• Requirements Identification
• Requirements Analysis
• Requirements Specification
– Design:
• Design Production
g
• Design Refactoring
• Design Reuse
• Design Documentation

GRAA

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3/3/2011

• These tools are concerned with the
implementation stages of the lifecycle,
p g y ,
typically coding, testing and documentation.
• They aim to increase the reliability,
adaptability and productivity of the delivered
code.
• 4GLs may be considered as back‐end CASE
Tools, such as Telon.

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• The typical responsibilities of a LowerCASE Tool is
to support the performance of the following
tasks:
k
– Implementation:
• Implementation Reuse
• Programming
• Debugging
– Integration Tasks:
g
• Integration Planning
• Component Integration
• Integration Reporting

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3/3/2011

• Aim to support the whole development cycle
and are linked to specific methodologies.
• They are often complex and expensive, but
offer the developer the greatest integrity of all
approaches through the use of a single data
encyclopaedia throughout the lifecycle.
p ( g
• Example: IEF (Information Engineering g
Facility), IEW (Information Engineering
Workbench)

GRAA

• Help standardization of notations and diagrams
• Productivity increases
• Help communication between development team
members
• Automates the methodology – this improves
consistency, but restricts creativity.
• Reduction of time and effort
• Automated tools are provided to prepare
Automated tools are provided to prepare
documentation
• Complexity of maintenance decreases.

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3/3/2011

• Cost Increases: Costs for purchase + training
• Expertise needed
Expertise needed
• Training issues
• Not mapping to current methods or
applications.
• May lead to restriction to the tool’s tool s
capabilities
• Limitations in flexibility of documentation

• Common CASE risks and associated controls
include:
– Inadequate standardization
– Unrealistic expectations
– Slow implementation
– Weak repository controls

GRAA

8

Case Tools

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