to calculate partial and total productivity of production factors in broiler farms in yazd province, 72 manufacturing units were selected based on simple random sampling method and their information and statistics were collected for one production period in the second half of 2013. to measure productivity, the cobb-douglas production function was estimated using classic and fuzzy regression met...

Production costs in general, and workforce and inventory costs in particular, constitute a large fraction of the operating costs of many manufacturing plants. We introduce cooperative aggregate production planning as a way to decrease these costs. That is, when production planning of two or more facilities (plants) is integrated, they can interchange workforce and products inventory; thus, thei...

The sources of aggregate productivity growth are explored using detailed data for four-digit U.S. manufacturing industries during 1958-96 and a decomposition formula which allows to quantify the contribution of structural change. Labor productivity as well as total factor productivity are considered and the aggregation is performed with either value-added or employment shares. It is shown that ...

aggregate production planning (app) is one of the most important issues carried out in manufacturing environments which seeks efficient planning, scheduling and coordination of all production activities that optimizes the company's objectives. in this paper, we develop a mixed integer linear programming (milp) model for an integrated aggregate production planning system with closed loop su...

This paper aims to show why the answer to the food security paradox in Pakistan cannot currently receive an answer, due to the type of policy assessment done until now. In order to know whether a given policy has been effective or not, it needs to be assessed. The problem in Pakistan is that food security policies have not received the right type of assessment. It appears to have been a neglect...

Despite Internet success and the fact that software has become the factory in many businesses, questions remain concerning information technology (IT) business value, the IT payoff paradox, and why IT even matters. While numerous econometric studies have established that there is significant business value from IT investments at an aggregate level, it is often unclear how this value accrues spe...

In many decision making problems evaluations of possible alternatives of choice, with respect to several points of view (criteria) are expressed by means of h−interval (or fuzzy numbers). For example a pessimistic and an optimistic evaluation generate an interval containing the exact evaluation. These situations reflect lack of information or uncertainty on the same evaluations. In this paper w...

The problem of choosing an appropriate total order is crucial for many applications that make use of extensions of fuzzy sets. In this work we introduce the concept of an admissible order as a total order that extends the usual partial order between intervals. We propose a method to build these admissible orders in terms of two aggregation functions and we prove that some of the most used examp...

Before describing the contents of this issue, let me say that we are very pleased to have established relationships with the Tepper School of Business at Carnegie Mellon University and the Southwest Search and Matching Group. These relationships allow us to have ongoing agendas as they will meet regularly throughout the years to come. The conferences we have with the Tepper School of Business a...

This two-part state-of-the-art overview on aggregation theory summarizes the essential information concerning aggregation issues. An overview of aggregation properties is given, including the basic classification on aggregation functions. In this first part, the stress is put on means, i.e., averaging aggregation functions, both with fixed arity (n-ary means) and with multiple arities (extended...