The correct option is: Science, not rule of thumb.

Explanation:
F.W. Taylor, known as the father of Scientific Management, pioneered the introduction of scientific inquiry into the domain of management practice.
Before Taylor's principles, management decisions and work methods were largely based on trial-and-error, personal judgements, or past experiences of managers (referred to as the "rule of thumb").

The principle of "Science, not rule of thumb" advocates for the following key ideas:
1. Every job or task performed in an organization should be scientifically analyzed rather than being done by intuition or traditional methods.
2. A scientific inquiry should be used to determine the standard time, best method, and tools required to perform a particular job efficiently.
3. By replacing old rule-of-thumb methods with scientific study, organizations can standardize work processes, reduce wasted effort, and maximize productivity.

Therefore, Taylor's pioneer introduction of scientific inquiry directly corresponds to the principle of Science, not rule of thumb.