II. CAD
CAD has only been around a few years, but has been an important advancement. It will be replaced, but has been an important transition to the more powerful future. CAD taught designers about computers, file management, and new organizational skills. CAD has been an amazing event. Instead of drawing on paper, you draw on a computer and see your work on the monitor. Fundamentally, CAD replaced hand drawing but did not substantially change the process or the way the information was displayed. A page of drawings was replaced with a drawing file. Instead of spending days or weeks creating background drawings, they were ready instantly. Unfortunately, if you changed the base drawing, you still needed to swap out the old backgrounds for the new. Errors and omissions were not eliminated, but they were reduced. For example, dimensions were accurate. CAD based contract documents can be created much faster than hand created drawings. CAD started as 2D only, but has now progressed to 3D. To date, it has not progressed to the level that it is practical to try to create a complete project in one 3D file.