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The process through which an existing system undergoes an alternation, to be reconstituted in a new form, is called Re-Engineering . option c)

Re-engineering is the examination, analysis and alteration of an existing software system to reconstitute it in a new form, and the subsequent implementation of the new form. The process typically encompasses a combination of other processes such as reverse engineering, redocumentation, restructuring, translation, and forward engineering. The goal is to understand the existing software (specification, design, implementation) and then to re-implement it to improve the system's functionality, performance or implementation.

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