This is a post by Helga Stroehle on PTC site.

Reinventing the wheel, as any engineer will tell you, is rarely the best use of time and resources.  Yet designs are lost and recreated all the time. Old files become obsolete–think vellum and floppy drives.  Companies change management or owners. Processes change. People move on. Who knows where Hal stashed that deck lid design before he retired?

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