CASE tools automate and support various phases of the systems development life cycle. They include upper-CASE tools that support early phases, lower-CASE tools that support later phases, and I-CASE tools that support the entire SDLC. CASE tools improve software quality by reducing errors, improving designs, standardizing tasks, and providing automated functions. While acquisition and training costs of CASE tools are high, their use generally increases development productivity and quality.

1. CaSe To0ls In
SySteM
DeVeLoPmEnT
Vivek Kathayat
Mbadu Yashica

2. COMPUTER AIDED SYSTEMS
ENGINEERING(CASE)
CASE is a term covering
a whole range of tools
and methods that
SUPPORT SOFTWARE
SYSTEM DEVELOPMENT.

3. WHAT IS CASE TOOLS?
CASE tools are programs
(software) that
automate or support one
or more phases of a
systems development life
cycle.

4. WHY CASE IS USED?
 Increasing costs of software development
due to the extreme intensive labor
required.
 Avoid simple human errors in software
development.
 CASE offers an important opportunity to
alleviate the problems of application
development and maintenance.

5. TYPES OF CASE TOOLS
 Upper-CASE:- describes tools that
automate or support the ‘upper’ or
earliest phases of systems development
 Lower-CASE:- describes tools that
automate or support the ‘lower’ or later
phases of systems development
 I-CASE (integrative case):- support the
entire SDLC

6. CASE TOOL and METHOD
CATEGORIES
Data Modelling
Refactoring tools
Source code generation
Unified Modelling Language
Documentation

7. Data Modeling
What is Data Modeling?
A method that defines data
requirements as data models
representing the business processes of
the system.

8. Refactoring
 What Is It?
The process of modifying a systems
internal structure without changing its
external behavior and functionality
Can be thought of as a special type
of Program Transformation
 Example -
RENAMING A CLASS!

9. Source code generation
 What is It……..Oh wait, That’s easy!
 Simple Description
Source Code Generation is the
generation of code.
 Better Description
Method for generating code based on an
ontological model of the source language
containing language concepts and their
relationships

10. Source code generation
 How it improves Software Quality
 Human Error does not mix well with coding
 Developer benefited by automatic
suggestions of
variables, classes, components, etc
meaning less risk of errors
 Generated code can be almost always
guaranteed as correctly written

11. Unified Modeling Language
 What is It?
 Standardized general-purpose visualizing
modeling language
 Combine multiple methods of modeling and
diagrams to form a comprehensive whole
 What is it used for?
 Used to construct and document objects
and object-oriented systems
 Equivalent to a blueprint for a building but
with the blueprint representing software

12. Documentation
 What is It?
 Documentation tools allow the
creation, modification, and updating of
system documentation
 Compared to other CASE tools these are
considerably more basic, however this
shouldn’t be taken as useless!
 Documentation tools can be used to –
 Generate standard forms
 Auto correct spelling mistakes
 Improve layout
 Generate documentation automatically

13. Documentation
 Why it benefits Software Quality?
 Documentation details the system and its
development, if there’s a problem good
documentation is invaluable for finding
recent modifications or solving the error
 Use of tools results in a more polished
document, one that is a higher-quality
 It can create documentation from code
(such as Class Definitions) that accurately
depicts the codes functions with a depth of
detail a human developer couldn’t achieve
without more time

14. CASE tool support
Requirements storage
Requirements should be managed in a
secure, managed data store.
Change management
The process of change management is a
workflow process whose stages can be defined
and information flow between these stages
partially automated.
Traceability management
Automated retrieval of the links between
requirements.

15. CASE Tool
Repository
Heart of CASE tool is the
central repository.
Stores all the information
to
analyze, create, design
and modify an
application from
feasibility to
implementation and
maintenance.

16. CASE Repository Functions
Data-data integration
database management system allowing
access to related objects so functions can
be achieved.
Methodology enforcement
E-R model used to define steps needed to
be conducted to build the repository contents.
Document standardization
definition of objects in the database leads
directly to a standard approach for creation of
engineering documents.

17. CASE Repository Functions
Data integrity
Includes functions to validate entries to the
repository and ensure consistency among related
objects
Information sharing
provides mechanism for sharing information
among multiple developers and multiple
tools, controls modification of information
Data-tool integration
establishes shared data model and performs
configuration management functions

18. CASE Tool Components

19. The Good and Bad News
about CASE
 Development process
productivity and quality
increases are realizable
 Portability of new systems
to other platforms is
greatly enhanced
 Analyst skill set will
improve due to greater
understanding of the
process
 Time to delivery of new
applications will decrease
 Conformity to
development standards
will increase
 CASE acquisition costs
are extremely high
 Training of analysts and
administrators is costly
and time-consuming
 Most organizations do not
have clear standards for
application development
 CASE tools can be
viewed as a threat to job
security
 CASE tools do not have a
great reputation due to
early benefits not being
realized

20. CASE Summary
 Overall use of CASE tools on a software system
improves software quality dramatically by –
 Reducing errors
 Improving designs throughout the development
 Standardizing many tasks and development
aspects
 Providing many many well-tested automated
functions
 Centralizing resources
 CASE is so good for software development its
extremely rare to find a program that doesn’t
include some form of it within the last 2 decades

21. QUIZ
 What is the full form of CASE ?
a. Computer Aided System Engineering
b. Computer Aided Shooting Engineer
c. Computer Aided System Development

22. Quiz
 What is the full form of UML .
a. Universal Modelling Language .
b. Unified Modelling Language .
c. Universal Modified Language .

23. THANK YOU !!!!!