Vehicle production has fallen since the beginning of pandemic recession. We investigate reasons for this decline. Manufacturers in industry cite insufficient materials, including a lack semiconductors, as increasingly responsible. Demand seems to be less an issue. In fact, demand been strong, and together with accelerating prices sharply declining inventories, it suggests supply new cars. Our b...

A long time has passed since I last gave chemotherapy, but I have not been immune to the news about the drug shortages in the past few years. Therefore, I wanted to explore what was behind the headlines like “U.S. facing cancer drug shortage: Ariz. doctors rationing supplies; FDA allowing India imports” in the February 22nd Arizona Business News (Alltucker, 2012). You may have been more directl...

Recently, Skouri et al. (2009) proposed two inventory models with general ramp-type demand rate, Weibull deterioration rate, and partial backlogging of unsatisfied demand: (a) Model 1 was starting with no shortages, and Model 2 was starting with shortages. They derived the optimal solutions for both models. Then they ran 2 numerical examples, and concluded that ”the total cost for the model sta...

Manna and Chaudhuri (Eur. J. Oper. Res. 171(2):557–566, 2006) presented a production-inventory system for deteriorating items with demand rate being a linearly ramp type function of time and production rate being proportional to the demand rate. The two models without shortages and with shortages were discussed. Both models were studied assuming that the time point at which the demand is stabil...

Nutrition support practitioners are currently dealing with shortages of parenteral nutrition micronutrients, including multivitamins (MVI), selenium and zinc. A recent survey from the American Society of Enteral and Parenteral Nutrition (ASPEN) indicates that this shortage is having a profound effect on clinical practice. A majority of respondents reported taking some aggressive measures to rat...

Within the field of nurse rostering[2], solving personnel shortages is a central problem. Trivedi and Warner[11] and Gascon et al. [5] introduce a pool of float nurses. They solve shortages by using nurses from this pool. Siferd and Benton[10] tackle shortages by calling nurses from other wards and by allowing nurses to work overtime. Meisels and Kaplanksi[6] pioneered a negotiation based appro...