Re-engineering means having a re-look at an entity, such as process, task, design, approach or strategy using engineering principles to bring in radical and dramatic improvement. The re-look is multi-dimensional and is taken by specialists in different fields. Re-engineering becomes a necessity for various reasons, such as:

•    Ageing of the system and its impact on the performance,
•    Frequent failures,
•    Use of outdated technology leading to adverse cost implications and so on.

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