We describe two simulation models for repair processes of aircraft in the Navy, and suggest ways to reduce cycle time and improve readiness. The models illustrate the e ects of material availability and process redesign on repair cycle time and work-in-process inventory levels for critical components. Our results indicate that the Navy could signi cantly reduce repair cycle times of those compo...

Several recent experiments on DNA-damage-induced signaling networks in mammalian cells have shown interesting dynamics in p53 protein expression during the repair cycle. Pulses of p53 are produced, whose frequency and amplitude are fairly independent of the amount of damage, but the probability of a cell exhibiting this pulsatile behavior increases with damage. This phenomenon has been describe...

This paper studies spare part transshipments between two service part facilities whose demands are correlated. Transshipments are used to reduce severity of part stock outs. Facilities are run by an inventory manager (IM) who minimizes replenishment, transshipment, and inventory costs. We show that the optimal transshipment policy is an inventory hold-back type; if the part inventory at a facil...

Communicating Applied Mathematics is a writingand speaking-intensive graduate course at North Carolina State University. The purpose of this article is to provide a brief description of the course objectives and the assignments. Parts A–D of of this article represent the class projects and illustrate the outcome of the course: • The Evolution of an Optimization Test Problem: From Motivation to ...

tires represent a critical spare part in mines. there is a shortage of medium and large tires. in addition, with increased mining activities and the creation of new mines, the demand for tires has increased significantly. thus, it is particularly important for mining engineers to identify tire characteristics and correctly manage the spare part inventory. spare parts management is critical from...

Tires represent a critical spare part in mines. There is a shortage of medium and large tires. In addition, with increased mining activities and the creation of new mines, the demand for tires has increased significantly. Thus, it is particularly important for mining engineers to identify tire characteristics and correctly manage the spare part inventory. Spare parts management is critical from...

The international legal order, although pluralist in structure, is in the process of being constitutionalized. This article supports this claim in several different ways. In the Part L I argue that most accepted understandings of "constitution" would readily apply to at least some international regimes. In Part II, I discuss different notions of "constitutional pluralism," and demonstrate that ...

This paper deals with the problem of spare part returns and its impact on the degradation of a production unit. The main motivation in this context is how to reuse a recovered spare part and at what level (quality) the remanufacturing action should be performed. The manufacturing under study consists of one failing and repairable machine. Our objective is to determine the decision thresholds ds...