Apparently the factory in Osnabruck is being equipped and modified so that it would accommodate the manufacturing of both the Porsche Cayman and the Porsche Boxster but that’s not the whole story.
In reality, VW would only really make the Cayman and Boxster if Porsche get overwhelmed by orders of these models. In case you’re not exactly the believing sort, you should know that the Volkswagen insider sharing this information is actually Ludger Teeken, CEO of the Osnabruck plant.
Porsche Cayman R
And in case you still find this hard to understand perhaps I can be of some assistance by saying that Porsche and VW have shared production facilities and such for quite some time now. Back in the 80s and 90s the Porsche 924 and 944 went through the same process as the Cayman and Boxster might.