We consider a two echelon supply chain: a single retailer holds a finished goods inventory to meet an i.i.d. customer demand, and a single manufacturer produces the retailer’s replenishment orders on a make-to-order basis. In this setting the retailer’s order decision has a direct impact on the manufacturer’s production. It is a well known phenomenon that inventory control policies at the retai...

Due-dates are often determined during sales negotiations between customers and the sales team of the firm. In the preliminary (pre-sale) stage, the customer provides a time interval (due-window) of his preferred due-dates. This interval reflects acceptable leadtimes, which are functions of the customer resource constraints (e.g. storage or personnel limitations). If the due-dates are assigned e...

The combination of demand uncertainty and a lead time for adding capacity creates the risk of capacity shortage during the lead time. We formulate a model of capacity expansion for uncertain exponential demand growth and deterministic expansion lead times when there is an obligation to provide a specified level of service. The service level, defined in terms of the ratio of expected lead time s...

In many multi-echelon inventory systems, the lead times are random variables. A common and reasonable assumption in most models is that replenishment orders do not cross, which implies that successive lead times are correlated. However, the process that generates such lead times is usually not well defined, which is especially a problem for simulation modeling. In this paper, we use results fro...

The standard 4-dimensional Minkowski space-time of special relativity is based on the 3-dimensional Euclidean metric. In 1967, H. Busemann showed that similar space-time models can be based on an arbitrary metric space. In this paper, we search for the broadest possible generalization of a metric under which a construction similar to Minkowski space-time leads to a physically reasonable space-t...

We present a heavy traÆc analysis for a G/G/1 queue in which customers have unbounded random deadlines correlated with their service times. The customers are processed according to the earliest-deadlinerst (EDF) queue discipline. At any time, the customers have a lead time, the time until their deadline lapses. We model the evolution of these lead times as a random measure on the real line. Und...

The standard 4-dimensional Minkowski space-time of special relativity is based on the 3-dimensional Euclidean metric. In 1967, H. Busemann showed that similar static space-time models can be based on an arbitrary metric space. In this paper, we search for the broadest possible generalization of a metric under which a construction of a static spacetime leads to a physically reasonable space-time...

One of the characteristics community is that there continuous change, always experiencing dynamics and developments due to demands times. This includes Islamic boarding schools. study discusses renewal pesantren education system in face era globalization. So purpose this research formulate strategies needed deal with it. The approach used a qualitative which library research. results show key s...

Research background: Today’s dynamic times in era of globalization bring change to all areas business; there is increasing pressure increase the competitiveness companies and thus requirements for management. Despite current trends, emancipation globalization, issue gender equality policy still relevant needs be addressed. New management disciplines include diversity It focuses on different soc...