The document discusses various types of incentive schemes and performance-based pay systems used in human resource management. It defines incentives as variable awards granted to employees based on their performance levels. Some key incentive plans described include: straight piece-rate systems where earnings directly correspond to output; standard hour systems where workers are paid for a set standard time regardless of actual time taken; and Halsey, Rowan, and Barth plans where bonuses are provided for completing work faster than the standard time. The document also outlines prerequisites for effective incentive systems and types of incentive schemes where earnings differ at different output levels, such as Taylor's, Merrick's, Gantt's, and Emerson's plans.