1. Software Reengineering
Done by: Fatima Abdelkader Haouari
2001/59617

2. Reengineering What is it? Rebuilding a software to create a more
powerful product.
Who does it?
-Organizational level: business specialists.
-Software level:Software engineers.
Why it is important?
The rapid change in information technology.

3. Reengineering What are the steps?
Step 1: Business process reengineering. (BPR)
The search for, and the implementation of, radical
change in business process to achieve breakthrough
results.
Step 2: Software reengineering process.
Rebuilding a software to create another with added
functionality, better performance and reliability.

4. Business process reengineering
Business process: A set of logically related tasks performed to achieve a defined business outcome.
Business process reengineering (BPR): The search for, and the implementation of, radical change in business process to achieve breakthrough results.

5. A BPR model
A model for business process reengineering defines six activities.
Business Definition
Process Identification
Refinement and instantiation
Prototyping
Process Evaluation
Process specification
and design

6. A BPR model Activities
Business definition: business goals are identified.
Process identification: processes critical to achieving business goals are identified and prioritized.
Process evaluation: existing processes are analyzed and measured, costs and time consumed by processes are noted, quality/performance problems are isolated

7. A BPR model Activities
Process specification and design: use cases are prepared for each process that is to be redesigned.
Prototyping: used to test processes before integrating them into the business.
Refinement and instantiation: business processes are refined and then instantiated within a business system

8. Software reengineering process
Definition: Rebuilding a software to create another
with added functionality, better performance and
reliability.

9. Software reengineering process model
Software reengineering process model defines six activities.
Inventory analysis
Document restructuring
Forward engineering
Reverse engineering
Data restructuring
Code restructuring

10. Software reengineering process model activities
Inventory analysis: sorting active software applications to identify reengineering candidates.
Document restructuring: There are three options:
to live with weak documentation.
update poor documents if they are used.
fully rewrite the documentation.
Reverse engineering: Analyzing the program to create a representation of the program in a higher level of abstraction than source code.

11. Software reengineering process model activities
Code restructuring: source code is analyzed and violations of structured programming practices are noted and repaired.
Data Restructuring: current data architecture is dissected and data models are defined, existing data structures are reviewed for quality.
Forward engineering: recovers design information from existing source code and uses this information to reconstitute the existing system to improve its overall quality and/or performance.

12. Questions
Question1: Which of the following activities is not part of the software reengineering process model?
A) forward engineering
B) inventory analysis
C) prototyping
D) reverse engineering

13. Questions
Question2: The software reengineering process model includes restructuring activities for which of the following work items?
A) code
B) documentation
C) data
D) all of the above

14. Questions
Question3: Which of these benefits can be achieved when software is restructured?
A) higher quality programs
B) reduced maintenance effort
C) software easier to test
D) all of the above

15. Fatima Abdelkader Haouari 2001/59617
Thank you
Fatima Abdelkader Haouari
2001/59617