Siemens announced that it will acquire the rail systems business from Invensys ISYS for GBX 1.4 billion, which is roughly 2 times fiscal 2012 sales and 10.4 times 2012 EBITDA. In isolation, the purchase makes sense for Siemens by helping the company build its presence in the rail industry and by giving the firm additional products in its current rail division. That said, Siemens seemed to be on a path of rebuilding and restructuring, with the company disposing of noncore businesses and stripping costs out of the operating segments. To that end, a new business requiring management’s attention may not…