Patch-By-Exception was originally brought out by Krone, however, other data cabling product vendors are also adopting this concept in their product line.
Traditionally, comms (mainly telephones) was patched by running jumper wires between two IDC blocks, and before then was done either by soldering jumper onto tags or wirewrapping onto thin posts using a wire wrap tool. Data patching was done using a length of patch cord with the appropiate data connection plugs on each end, nowdays, it is RJ-45, but is not limited to that.
Both methods of patching had their merits, which included costs (both capital and maintainence), space requirements, usablity, and visual appearence.
Patch-by-Exception is designed to have the tidiness and cost savings of a jumper type patch panel, but also have the flexibilty and ease of adds/moves/changes of traditonal data patch panel.