One kind of mid-term production system, aggregate production planning, identifies the optimum production plan for each production period. The goal of aggregate production planning is to forecast future demand swings. On the other hand, maintenance system identifies the proper time for preventive maintenance and restrains from break downs and reduces maintenance costs. Due to the importance of t...

We present a model with heterogeneous firms, in which credit constraints may give rise to self-fulfilling, sunspot-driven business cycle fluctuations. We derive optimal incentive-compatible loan contracts, under which a firm’s borrowing capacity is constrained by expected equity value. Interactions between debt and equity value made possible by credit constraints generate a credit externality, ...

We consider an economy in which flat capital requirements are costly because they inefficiently reduce lending when aggregate conditions are unfavorable. Countercyclical capital requirements – which impose lower capital demands in bad aggregate states – have the potential to improve welfare. However, we show that such capital requirements also have a cost as they increase systemic risk taking a...

BACKGROUND Both stenting and the glycoprotein IIb/IIIa inhibitor abciximab improve outcomes for patients undergoing primary angioplasty for acute myocardial infarction (AMI). However, the cost-effectiveness of these strategies is unknown. METHODS AND RESULTS We performed a prospective cost-utility analysis among US participants in the CADILLAC trial. Patients with AMI (n=1703) were randomized...

Concrete performance is strongly affected by the particle packing degree since it determines the distribution of the cementitious component and the interaction of mineral particles. By using packing theory designers will be able to select optimal aggregate materials for preparing concrete with low cement content, which is beneficial from the point of cost. Optimum particle packing implies minim...

On Line Analytical Processing (OLAP) aims at gaining useful information quickly from large amounts of data residing in a data warehouse. To improve the quickness of response to queries, preaggregation is a useful strategy. However, it is usually impossible to pre-aggregate along all combinations of the dimensions. The multidimensional aspects of the data lead to combinatorial explosion in the n...

The Aggregate Production Plan (APP) is a schedule of the organization’s overall operations over a planning horizon to satisfy demand while minimizing costs. It is the baseline for any further planning and formulating the master production scheduling, resources, capacity and raw material planning. This paper presents a methodology to model the Aggregate Production Planning problem, which is comb...