부산대학교 도서관

Summary: ``In this paper, extended Markov manpower models areformulated by incorporating a new class of members of adepartmentalized manpower system in a homogeneous Markov manpowermodel. The new class, called limbo class, admits members of the systemwho exit to a limbo state for possible re-engagement in the activeclass. This results to two channels of recruitment: one from the limboclass and another from the outside environment. The idea is motivatedby the need to preserve trained and experienced individuals who couldbe lost in times of financial crises or due to contract completion. Thecontrol aspect of the manpower structure under the extended models areexamined. Under suitable stochastic condition for the flow matrices, itis proved that the maintainability of the manpower structure throughpromotion does not depend on the structural form of the limbo classwhen the system is expanding with priority on recruitment from outsideenvironment, nor on the structural form of the active class when thesystem is shrinking with priority on recruitment from the limbo class.Necessary and sufficient conditions for maintainability of the manpowerstructure through recruitment in the case of expanding systems are alsoestablished with proofs.''