Abstract. A network with restoration capability requires spare capacity to be used in the case of failure. Optimization of spare capacity is to find the minimum amount of spare capacity for the network to survive from network component failures. In this paper, this problem is investigated for wavelength division multiplexing (WDM) mesh networks without wavelength conversion. We propose a hybrid...

Demand and inventory management for spare parts are different than for components used in assembly of finished products, in reason of lumpy demand, larger variety and risk of stock obsolescence. The paper deals with three aspects: 1) a description of the elements of complexity peculiar to the spare parts supply chain; 2) a framework and a literature review about spare parts demand and inventory...

In this paper, we resort to Monte Carlo simulation for achieving a realistic modelling of the dynamics of a system supported by spare parts. The spare dynamics, namely the start-up of a spare unit upon failure of an on line unit, is caught by means of the multi-state correlation method previously introduced by some of the present authors to describe stand-by and load-share dependencies. The Mon...

Combine harvesters have a very important task in grain crop harvesting. Combine harvesters must fulfil lot of technological requirements regarding the field conditions, crop type, as well as the quality performance and optimal costs. The problem is that it is the main harvesting technology of cereals in the world and it has seasonal character of work, which has to be done in a relatively short ...

In the entire value stream of original spare part supply, packing is one of the main issues in the distribution system and its productivity is mainly affected by a particularly high proportion of manual work. This paper presents an approach to support practical work improvements in value streams generally, and from the theoretical and the practical point of view it shows how performance enhanci...