The separation of conception from execution is the structural mechanism at the center of Taylorism and its technological successors. Before separation, the skilled worker both planned and performed the work: the machinist read the drawing, designed the approach, and executed the cuts; the developer conceived the architecture, wrote the code, and maintained the system. After separation, planning is transferred to management — or to a centrally controlled system — while the worker executes procedures designed by others. The worker who conceived and executed was autonomous; the worker who merely executes work conceived by someone else is controlled.
The phrase is Harry Braverman's, though the underlying analysis traces to Marx's discussion of the transition from handicraft to manufacture in Capital Volume One. Braverman recognized that Taylor's explicit project was not merely efficiency improvement but a specific reorganization of the cognitive division of labor — a reorganization that concentrated