Economic lot size scheduling problem (ELSP) for a multi-product single machine system is a classical problem. This paper considers ELSP with budgetary constraint as an important aspect of such systems. In the real world situations the available funds for investment in inventory is limited. By adopting the common cycle time approach to ELSP, we obtain the optimal common cycle which minimizes the...

Following the identification of an emergency situation, a downtime allowance was introduced in Republic Latvia to compensate for restrictions imposed on employers and self-employed. Payment is intended only those employees self-employed persons who have paid social insurance contributions previous periods, thus small producers, craftsmen, farms were left without support, although their activiti...

The expected wait in the Gi/G/1 queue is related to the mean and variance of the idle time. For arrival distributions which are 1FR or have mean residual life bounded by r-, simple bounds are obtained which A. give, for example, the expected number in queue to within at most one customer. By equating input with output, relations between random variables are used to obtain expressions foi the mo...

In this paper, the problem of two-machine flow shop scheduling to minimize total energy costs under time-of-use tariffs is investigated. As the objective function of this study is not a regular measure, allowing intentional idle-time can be advantageous. So this study considers two approaches, one for non-delay version of the problem and the other one for a situation when inserting intentional ...