Instructions at the point of need

I’m looking for examples of information displays that convey instructions at the point of need/use.

I have examples of the Xerox 1090 which puts instructions right where somebody would need it—you don’t have to find it in a manual and then look back and forth between the object and the book.

Recently I was told of a plumbing shop that was prefabricating plumbing trees for new home construction that put the information on the floor of the shop at full size to guide the fabrication—the blueprint was on the floor at full scale.

The reason I’m interested is that construction drawing often take a long time read and are frequently misread and if a mistake is made all the subsequent drawing that assume a correct installation are all wrong as well.

Examples? Comments?