The process of software re-engineering is to improve the maintainability of a software system. Software re-engineering is a cost-effective option for software system evolution. Reverse engineering and program re-structuring which may be involved in the software re-engineering process.
There is a high risk in re-developing software that is essential for an organisation. Errors may be made in the system specification, there may be development problems, etc2. Reduced cost
The cost of re-engineering is significantly less than the costs of developing new software.