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Operations and Supply Chain Management Commons™

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2009

Discipline
Institution
Keyword
Publication
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Articles 61 - 69 of 69

Full-Text Articles in Operations and Supply Chain Management

Effect Of Restricted Access Time To Pasture On Dairy Cow Milk Production, Grazing Behavior, And Dry Matter Intake, E. Kennedy, M. Mcevoy, J. P. Murphy, M. O'Donovan Jan 2009

Effect Of Restricted Access Time To Pasture On Dairy Cow Milk Production, Grazing Behavior, And Dry Matter Intake, E. Kennedy, M. Mcevoy, J. P. Murphy, M. O'Donovan

Housing and Confinement of Farm Animals Collection

The objective of this experiment was to investigate the effect of restricting pasture access time on milk production and composition, body weight and body condition score change, dry matter intake, and grazing behavior of autumn calving dairy cows in midlactation. Fifty-two (19 primiparous and 33 multiparous) Holstein-Friesian dairy cows (mean calving date, August 17 ± 91.2 d) were randomly assigned to a 4-treatment (n = 13) randomized block design grazing study. The 4 grazing treatments were: (i) full-time access to pasture (22H; control), (ii) 9-h access to pasture (9H), (iii) two 4.5-h periods of access to pasture after both milkings …

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The Welfare Of Cows In The Dairy Industry Jan 2009

The Welfare Of Cows In The Dairy Industry

Agribusiness Reports

More than 9 million cows compose the U.S. dairy herd. Repeated reimpregnation, short calving intervals, overproduction of milk, restrictive housing systems, poor nutrition, and physical disorders impair the welfare of the animals in industrial dairy operations. Once their productivity wanes, the cows are often weak as a result of high metabolic output. Typically, these “spent” dairy cows are culled and processed as ground beef. In their fragile end-of-production state, handling, transport, and slaughter raise additional welfare concerns.

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The Welfare Of Sows Used For Breeding In The Pig Industry Jan 2009

The Welfare Of Sows Used For Breeding In The Pig Industry

Agribusiness Reports

The conditions afforded sows (adult female pigs) used for breeding on industrial pig production operations present a number of welfare problems. Sows are routinely confined in gestation and farrowing crates barely larger than their own bodies, where they are unable to turn around during their pregnancy and lactation periods, often in excess of 128 consecutive days. Behavioral abnormalities such as stereotypic bar-biting and aggression arise due to environmental deficiencies and restricted feeding regimens. Sows in large, industrial operations are also affected by a number of production-related diseases and suffer from higher mortality rates. A reevaluation of current confinement systems and …

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A Study Into The Use Of Business Process Reengineering In Re-Designing Procurement Processes Within The Southern Health Board, Treasa Dempsey Jan 2009

A Study Into The Use Of Business Process Reengineering In Re-Designing Procurement Processes Within The Southern Health Board, Treasa Dempsey

Theses

Prior to undertaking the implementation of an integrated finance and procurement information system, the Southern Health Board (now know as the Health Service Executive - Southern Area) undertook a Business Process Reengineering project to redesign, standardise, streamline, and document their procurement processes. This study examines how useful Business Process Reengineering can be in a public sector environment, using the project undertaken in the Southern Health Board, as a case study. The literature on BPR, in conjunction with the material from the BPR project, and interviews from relevant project team members, is examined. The case study demonstrates that it may be …

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Determinants Of The Probability Of Ship Injuries, Wayne K. Talley Jan 2009

Determinants Of The Probability Of Ship Injuries, Wayne K. Talley

Economics Faculty Publications

This study investigates determinants of the probability that an individual onboard a ship of a given shipping line will be injured (given that the ship is not involved in an accident). A Probit regression statistical model is used to investigate such determinants when ships are in port and on given types of containerships. Probit estimation results suggest that an individual is less likely to be injured in port onboard a ship that is larger in size and underway, but more likely to be injured if involved in a fall. An individual is less likely to be injured onboard a containership …

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A Metaheuristic For The Pickup And Delivery Problem With Split-Loads And Its Extension, Dai Yao Jan 2009

A Metaheuristic For The Pickup And Delivery Problem With Split-Loads And Its Extension, Dai Yao

Dissertations and Theses Collection (Open Access)

In this dissertation, we study improvements in the Pickup and Delivery Problem that can be achieved by allowing multiple vehicle trips to serve a common load. We explore how costs can be reduced through the elimination of the constraint that a load must be served by only one vehicle trip. Specifically, we investigate the problem of routing vehicles to serve loads that have distinct origins and destinations, with no constraint on the amount of a load that a vehicle may serve at a time. We develop a metaheuristic to solve large scale practical size problems in this form and apply …

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Maximizing Throughput Of Bucket Brigades On Discrete Work Stations, Yun Fong Lim, Kum Khiong Yang Jan 2009

Maximizing Throughput Of Bucket Brigades On Discrete Work Stations, Yun Fong Lim, Kum Khiong Yang

Research Collection Lee Kong Chian School Of Business

One way to coordinate workers along an assembly line that has fewer workers than work stations is to form a bucket brigade. The throughput of a bucket brigade on discrete work stations may be compromised due to blocking even if workers are sequenced from slowest to fastest. For a given work distribution on the stations we find policies that maximize the throughput of the line. When workers have very different production rates, fully cross-training the workers and sequencing them from slowest to fastest is almost always the best policy. This policy outperforms other policies for most work distributions except for …

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A Petri Net-Based Approach To Reconfigurable Manufacturing Systems Modeling, Linda L. Zhang, Brian Rodrigues Jan 2009

A Petri Net-Based Approach To Reconfigurable Manufacturing Systems Modeling, Linda L. Zhang, Brian Rodrigues

Research Collection Lee Kong Chian School Of Business

Reconfigurable manufacturing systems (RMSs) have been used to provide manufacturing companies with the required capacities and capabilities, when needed. Recognizing (1) the importance of dynamic modeling and visualization in decision making support in RMSs and (2) the limitations of the existing studies, we model RMSs based on Petri net (PN) techniques with focus on the process of reconfiguring system elements while considering constraints and system performance. In response to the modeling difficulties identified, a new formalism of colored timed PNs is introduced. In conjunction with colored tokens and timing in colored PNs and timed PNs, we further define a reconfiguration …

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Neural Network Application For Supplier Selection, Davood Golmohammadi Phd Dec 2008

Neural Network Application For Supplier Selection, Davood Golmohammadi Phd

Davood Golmohammadi

No abstract provided.

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