WHAT IS RE-ENGINEERING? EXAMINATION AND ALTERATION OF A SYSTEM TO RECONSTRUCT IT IN A NEW FORM REORGANISING AND MODIFYING EXISTING SOFTWARE SYSTEMS TO MAKE THEM MORE MAINTAINABLE

1. SOFTWARE RE-
ENGINEERING
PRESENTED BY: AMIT KUMAR
BCA IV

2. WHAT IS RE-ENGINEERING?
 EXAMINATION AND ALTERATION OF A
SYSTEM TO RECONSTRUCT IT IN A NEW
FORM
 REORGANISING AND MODIFYING
EXISTING SOFTWARE SYSTEMS TO MAKE
THEM MORE MAINTAINABLE

3. STEPS INVOLVED IN RE-
ENGINEERING
 SOURCE CODE TRANSLATION
 REVERSE ENGINEERING
 PROGRAM STRUCTURE IMPROVEMENT
 PROGRAM MODULARISATION
 DATA RE-ENGINEERING

4. SOURCE CODE
TRANSLATION
 CONVERTING CODE FROM ONE
LANGUAGE TO ANOTHER
 NEED OF TRANSLATION:
-> HARDWARE PLATFORM UPDATE
->STAFF SKILL SHORTAGE
->ORGANISATIONAL POLICY CHANGES

5. REVERSE ENGINEERING
 REORGANISING AND MODIFYING
EXISTING SOFTWARE SYSTEMS TO MAKE
THEM MORE MAINTAINABLE
 THE PROGRAM ITSELF IS UNCHANGED
 IT IS NOT THE SAME AS RE-ENGINEERING

6. PROGRAM STRUCTURE
IMPROVEMENT
 REORGANISING AND MODIFYING
EXISTING SOFTWARE SYSTEMS TO MAKE
THEM MORE MAINTAINABLE
 THE PROGRAM MAY BE AUTOMATICALLY
RESTRUCTURED TO REMOVE
UNCONDITIONAL BRANCHES
 CONDITIONS MAY BE SIMPLIFIED TO MAKE
THEM MORE READABLE

7. PROGRAM MODULARISATION
 THE PROCESS OF RE-ORGANISING A
PROGRAM SO THAT RELATED PROGRAM
PARTS ARE COLLECTED TOGETHER IN A
SINGLE MODULE
 DIFFERENT MODULES CAN BE CREATED:
-> HARDWARE MODULES
-> FUNCTIONAL MODULES
-> PROCESS SUPPORT MODULES
-> DATAABSTRACTIONS

8. DATA RE-ENGINEERING
 INVOLVES ANALYSING AND
REORGANISING THE DATA STRUCTURES
IN A SYSTEM TO MAKE IT MORE
UNDERSTANDABLE
 OBJECTIVE IS TO CREATE A MANAGED
DATA ENVIRONMENT

9. CONCLUSION
 SOFTWARE RE-ENGINEERING IS A COST
EFFECTIVE OPTION FOR SYSTEM
EVOLUTION
 CONSISTS OF MANY SUB-PROCESSES
 THE OBJECTIVE OF RE-ENGINEERING IS
TO IMPROVE THE SYSTEM STRUCTURE
TO MAKE IT EASIER TO UNDERSTAND AND
MAINTAIN

10. THANK YOU!