From about 1900 to 1915,
as he worked to solve practical production problems in factories all over the United States, Taylor
developed what later became known as his four principles of scientific management:
1. Eliminate the guesswork of rule-of-thumb approaches to deciding how each worker is to
do a job by adopting scientific measurements to break the job down into a series of small,
related tasks.
2. Use more scientific, systematic methods for selecting workers and training them for specific jobs.
