This document discusses different types of variable pay plans and incentive plans. It provides examples of individual incentive plans like merit pay, lump-sum bonuses, and spot awards. It also discusses group incentive plans like gain-sharing plans, which link pay to productivity savings, and profit-sharing plans, which link pay to financial measures. Both individual and group plans have advantages like raising productivity, but also disadvantages like increased conflict or reduced information sharing. The document provides details on the design and implementation of various incentive plan models.