We have a migration project (from Mega 2009 to Hopex V3) and I would like to know which is better in terms of time and integrity (to avoid data loss) : 1/ Migrating the data or 2/ performing new installation and redo all the work manually.
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That is not an easy question to answer - several things can impact your decision.
How much data do you have ?
What is the quality our your modelling?
Will there be a change in methodology, e.g. going from **** to IT **** V2 ?
Re-arranging objects into libraries, is probably still easier than to redraw everything.
The cost and time doing a migration in multiple steps needs to compared to all the time you would spend on redoing the modelling. If the quality of the modelling and if the data is outdated - you consider starting over again. Otherwise I would probably consider migration. Have you done any meta model customizations ?