In 1968, the furniture designer and RCA professor David Pye published The Nature and Art of Workmanship, a book built around a distinction between "workmanship of risk" and the "workmanship of certainty." Pye was not writing about architecture, and despite how the phrase gets used today, he was not really writing about hands versus machines either. He pointed out that a printing press, entirely mechanical, still depends on someone judging the ink and the register, while a woodturner working a lathe by hand can follow a template closely enough that almost nothing is left to chance.
Workmanship of risk, in Pye's definition, is any process where the outcome is not fixed in advance but depends on the judgment, dexterity, and attention the maker exercises while the work is still underway. Workmanship of certainty is the opposite condition, as the result is settled before production begins, locked into a jig, a mold, or a program, so that everything downstream is execution. Pye was careful to note that neither mode is inherently superior and that a numerically controlled machine, calibrated to leave room for drift, can sit closer to risk than a hand tool run to a fixed template.
