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
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