difference between ReEnginnering and Reverse Engineering

  Reengineering is the bridge used by legacy software to migrate to an organization’s new maintenance environment.

Reverse engineering is the general process of analyzing a technology specifically to ascertain how it was designed or how it operates. This kind of inquiry engages individuals in a constructive learning process about the operation of systems and products. Reverse engineering as a method is not confined to any particular purpose, but is often an important part of the scientific method and technological development. The process of taking something apart and revealing the way in which it works is often an effective way to learn how to build a technology or make improvements to it.

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Nandita,SQA