Which principle of scientific Management says that employees must be rewarded when they make suggestions that lead to cost savings within the company?

The principle of scientific management that states employees must be rewarded when they make suggestions that lead to cost savings within the company is the principle of "Incentive and Reward." This principle emphasizes the importance of providing incentives and rewards to employees for their contributions to improving efficiency and productivity in the workplace. By rewarding employees for their suggestions that result in cost savings, companies can motivate their employees to actively participate in the continuous improvement of processes and operations.