As the saying goes, excellence is in the details; if the goal is to create high quality, sound and foolproof structures with a zero margin for error then strict attention must be paid to the minutest of details.
In the context of buildings and architectural works, paying attention to detail goes past merely plugging a round peg in a round hole or making sure everything fits in perfectly; it is a proactive process where the fabricator (or constructor) accurately predicts potential issues and devises mechanisms to ameliorate these issues even before they occur. Attention to detail is first, the definitive pathway to creating structures that deliver the utmost value and, even more importantly, the benchmark for guaranteeing a 100% safety factor for any architectural piece.