Small- to medium-sized carriers should start the process about 3 to 4 months before they plan to begin hiring. Larger carriers need somewhat more time and should plan on starting the process about 6 months before the actual hiring begins. Although selection systems can sometimes be developed in less time, starting the development process several months before hiring begins reduces the stress on the personnel directly involved in hiring. It also allows management sufficient time to identify appropriate selection tests and negotiate user fees or purchases. Additionally, this lead time allows management sufficient time to train any employees who are new to selection and provide any training required to administer new tests.