Performance based bonuses (PBB) is an effective management tool but quite often it causes unintentional effects. PBB are supposed to improve productivity by compensating employees according to their contribution to productivity. However organizations are complex systems and it is impossible to measure an employee’s contribution accurately. Companies are forced to use performance models that are a simplification of reality. As a result, employees are focused on maximizing performance under the model which not completely aligned with the benefit of the company. In banking, for example, the bonus models underemphasized risk, causing a worldwide catastrophe. Leaving the financial crisis aside, there are other common pitfalls. It is simple to construct performance-based contribution for sales representatives. The more they sell the more they earn – simple. It is much harder to construct a model for back-end functions, say an IS developer. This is where it gets messy. Measurement by schedul...