There have been a number of ways of subdivision of total depth of cut during cost optimization in constrained multipass turning operation. The total production cost minimization is achieved by summation of the minimum costs of individual rough passes and finish pass based on the maximum possible selection of depth of cut for finish pass and distributing the balance of depth of cut among passes such as to achieve minimum range variation among all. The resulting subdivision of depth of cut yields lower or equal costs when compared to those determined by using traditional and nontraditional approaches suggested by other researchers.