This document discusses various time-based and productivity-based incentive plans for workers. It describes incentive plans like the Halsey Plan, Rowan Plan, Bedaux Plan, Emerson's Efficiency Plan, Gantt's Task and Bonus Scheme, and Taylor Incentive Plan. These plans provide bonuses or higher wages to workers for completing tasks faster than a preset standard time or at a higher productivity level than standard. The plans aim to motivate workers by rewarding those who are more efficient. Formulas for calculating wages under each plan are provided with examples. Advantages and disadvantages of each plan are also summarized.