The architect drew up the blueprint for the new house.
Where is the design drawing for this machine?
設計図 is a general technical drawing used in construction or engineering, while 青写真 specifically evokes the cyanotype-style blueprint or a visionary plan.
設計図 is a detailed architectural blueprint covering structure and specs, while 間取り refers specifically to the arrangement and size of rooms.
design specifications for public tender; drawings and specifications
Compound of 設計 (design) and 図 (drawing, diagram).