Taylor's scientific management consisted of four principles:
Replace rule-of-thumb work methods with methods based on a scientific study of the tasks.
Scientifically select, train, and develop each employee rather than passively leaving them to train themselves.
Provide "Detailed instruction and supervision of each worker in the performance of that worker's discrete task" (Montgomery 1997: 250).
Divide work nearly equally between managers and workers, so that the managers apply scientific management principles to planning the work and the workers actually perform the tasks.