One of the problems seen in woodworking industry is the uncertainty of lead time, because of this it is ıısually impossible to deliver the products on time. In this study, a furniture factory has been chosen as an application place. To improve traditional manufacturing System and to shorten the lead time, some machines have been changed. As a result, the earliest production time has been determined by CPMand the lead time has been reduced 6 hours 48 minutes (32.8%).