Differents between Reverse engineering & re engineering

Anyone can explain the Differents between Reverse engineering & re
engineering.

thanks in advance
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Te re-engineer usually means that a product design, tooling design,
structure or whatever (I'll use tooling for this ex.) is not 'up-to-par' or
sufficient and must be corrected. This may mean that it must be redesigned
(or re-engineered) to conform with code, better engineering practices, or it
simply does not fit the bill. Usually re-engineering means to correct an
existing tool, structure, etc. However, it could also apply to making
duplicate or similar tools that are re-engineered at the time of the build
to accomodate needed/wanted changes in the engineering design.

Reverse engineering is used to copy an existing tool exactly. Generally,
dimensions and/or scans must be taken of the existing tool and the engineer
must build to those numbers. Presumably, someone else designed and/or built
the tool trying to be duplicated which is why you'd need to scale the
existing one.

Here is an example:

In the 40's the Soviet Union wanted to build a new long-range bomber. They
got their hands on a US B-29. They duplicated that plane to the last bolt
and bulkhead making no known design changes whatsoever. They Reverse
Engineered the entire aircraft, yet they Reengineered not a single part.

 

thanks for the explaination,with example
have a nice day