The "idea box” is a useful concept in management. It was first introduced in the early twentieth century by Kodak in the United States and Michelin in France. The managers of these companies used idea boxes to collect suggestions from employees about improving production. Today, the idea box is not used much in the United States or Europe. However, it is used a lot in Japan. Japanese managers have found it to be a very valuable resource. Employees often know more than managers about the details of production. In the long run, their suggestions can make a real difference to the company. Employees who offer useful ideas may receive extra money in their paychecks.