102,051 research outputs found
V. Cesarotti, G. Mummolo, L. Ranieri Allocazione ottimale delle risorse finanziarie e configurazione impiantistica nella redazione di piani d’ambito (parte II)
No full textA sustainable order quantity model under uncertain product demand
No full textThe Economic Order Quantity (EOQ) model is one of the most known classical continuous review inventory model based on the trade-off between holding and order costs. In actual logistic systems, transport costs play a key role, and in case of stochastic variability of product demand and/or supply lead time, a safety stock is required. Transport and safety stock costs affect the solution of the lot size problem. Recently, wide attention is being paid to sustainable manufacturing and in particular on negative effects of transport. Transports are the main source of air pollutant emissions in EU and are expected to increase in magnitude in the future. Costs evaluations of transport emissions are defined in EU documents based on Kyoto protocol. When transport environmental costs are considered in the logistic cost function a new lot-sizing problem can be defined. In (Digiesi, Mossa and Mummolo 2012), the Sustainable Order Quantity (SOQ) analytical model is proposed aiming at identifying optimal lot-size and transport means which minimize the logistic and environmental costs in case of a deterministic product demand. In this paper, the authors propose an SOQ model in case of stochastic variability of product demand. Analytical model solutions rely on sustainable (in terms of both logistic and environmental costs) order size, transport means and safety stocks. Results obtained in a full case study from automotive supply chain case study are presented
Quality and Reliability of Safety Relief Valves
No full textThe leading particulates of safety relief valve testing facilities, judged by the ISPESL Italian Control Authorities as being suitable and reliable, were singled out. These facilities enabled a whole cycle of experimental tests to be conducted in free blowdown and variable back pressure conditions, which led to the evaluation of the leading performance characteristics of a new series of safety relief valves in accordance with real working conditions. The protective function of these devices justifies the interest in any possible further improvement of their performance, quality and reliability
The future for industrial engineers: education and research opportunities
No full textEU graduation and the recruitment of industrial engineers (IEs) have been investigated. An increasing
demand is observed for graduates in almost all industrial engineering (IE) subjects. The labour market
in the EU is evolving towards the service sector even if manufacturing still represents a significant
share of both IE employment and gross domestic product. On average, IE in the EU is still within the
framework of the ‘market-driven’ paradigm, which contrasts with the knowledge society aims pursued
by the ‘Bologna process’. R&D resources and human capital are identified as major success factors to
overcome current limits for IE development in the EU. With reference to both factors, a comparison
between the EU, Japan and the US is provided. In the EU, the attractiveness of universities and the
social dimension are recognized as major forces attracting human capital. Patent maps outline current
and future IE research and education fields of interests. Finally, EU higher education opportunities are
briefly described
Quality and Reliability of Safety Relief Valves
No full textThe leading particulates of safety relief valve testing facilities, judged by the ISPESL Italian Control Authorities as being suitable and reliable, were singled out. These facilities enabled a whole cycle of experimental tests to be conducted in free blowdown and variable back pressure conditions, which led to the evaluation of the leading performance characteristics of a new series of safety relief valves in accordance with real working conditions. The protective function of these devices justifies the interest in any possible further improvement of their performance, quality and reliability
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