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Last time buy and repair decisions for spare parts

Original Equipment Manufacturers (OEM’s) of advanced capital goods often offer service contracts for system support to their customers, for which spare parts are needed. Due to technological changes, suppliers of spare parts may stop production at some point in time. As a reaction to that decision, an OEM may place a so-called Last Time Buy (LTB) order to cover demand for spare parts during the...

LAST but not Least: Online Spanners for Buy-at-Bulk

The online (uniform) buy-at-bulk network design problem asks us to design a network, where the edge-costs exhibit economy-of-scale. Previous approaches to this problem used treeembeddings, giving us randomized algorithms. Moreover, the optimal results with a logarithmic competitive ratio requires the metric on which the network is being built to be known up-front; the competitive ratios then de...

Last time buy decisions for products sold under warranty

Manufacturers supplying products under warranty need a strategy to deal with failures during the warranty period: repair the product or replace it by a new one, depending on e.g. age and/or usage of the failed product. An (implicit) assumption in virtually all models is that new products to replace the failed ones are immediately available at given replacement costs. Because of the short life c...

Explorer To Buy or Not to Buy ?

This paper examines the interaction of law and policy making on prostitution, with that of BDSM (bondage and discipline, sadism and masochism). Recent policy and legal shifts in the UK mark out prostitutes as vulnerable and in need of ‘rescue’. BDSM that amounts to actual bodily harm is unlawful in the UK, and calls to decriminalise it are often met with fears that participants will be left vul...

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