Errors start when technical data is transferred by hand.
Technical data packages define the ideal, but they are static, and the physical asset changes. Translating 2D diagrams onto physical surfaces by hand invites misplaced boundaries, drifting curves, and inconsistent scale. Physical errors are inevitable, and costly when discovered after the work is done.
SPIDER anchors patterns, boundaries, and placement zones directly on the part, so every technician works from the same aligned reference.