Steve--the Zen master of deep discussion on all things building--explains how he thinks of these two terms. If you don't integrate, you end up solving during application, be it moving water off the building or transferring structural loads. This approach to designing, specifying, and constructing means the window package is connected to the HVAC system, the roof plan connects entryways to gutters, and a problem popping up on paper won't get better or easier on the job site. Although you might get discouraged with the dubious initial focus on beanie babies, hang in there for some insightful exchanges with Steve, Jake, and Pete.