Bell curve is a statistical tool used in performance management and evaluation. It evaluates employee performance and based on the findings distributes ratings in graphical representation. It is called a bell curve because when the data distribution is done, it results in the shape of a bell.
In HR, the bell curve is traditionally used to categorize employee performance into distinct groups, such as top performers, average performers, and low performers, based on their relative performance. Managers use this distribution model to rank employees into specific performance buckets, typically allocating a small percentage to the top and bottom categories, with the majority falling into the average group. This approach helps identify high performers who are eligible for rewards, bonuses, and promotions, thereby incentivizing excellence. Conversely, it also highlights low performers who may require targeted improvement plans and additional support to enhance their productivity and contributions.
Here are some of the key benefits of using Bell Curve in HR management.