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1 – 10 of over 10000
Article
Publication date: 14 December 2017

Vinod K.T., S. Prabagaran and O.A. Joseph

The purpose of this paper is to determine the interaction between dynamic due date assignment methods and scheduling decision rules in a typical dynamic job shop production system…

Abstract

Purpose

The purpose of this paper is to determine the interaction between dynamic due date assignment methods and scheduling decision rules in a typical dynamic job shop production system in which setup times are sequence dependent. Two due date assignment methods and six scheduling rules are considered for detailed investigation. The scheduling rules include two new rules which are modifications of the existing rules. The performance of the job shop system is evaluated using various measures related to flow time and tardiness.

Design/methodology/approach

A discrete-event simulation model is developed to describe the operation of the job shop. The simulation results are subjected to statistical analysis based on the method of analysis of variance. Regression-based analytical models have been developed using the simulation results. Since the due date assignment methods and the scheduling rules are qualitative in nature, they are modeled using dummy variables. The validation of the regression models involves comparing the predictions of the performance measures of the system with the results obtained through simulation.

Findings

The proposed scheduling rules provide better performance for the mean tardiness measure under both the due date assignment methods. The regression models yield a good prediction of the performance of the job shop.

Research limitations/implications

Other methods of due date assignment can also be considered. There is a need for further research to investigate the performance of due date assignment methods and scheduling rules for the experimental conditions that involve system disruptions, namely, breakdowns of machines.

Practical implications

The explicit consideration of sequence-dependent setup time (SDST) certainly enhances the performance of the system. With appropriate combination of due date assignment methods and scheduling rules, better performance of the system can be obtained under different shop floor conditions characterized by setup time and arrival rate of jobs. With reductions in mean flow time and mean tardiness, customers are benefitted in terms of timely delivery promises, thus leading to improved service level of the firm. Reductions in manufacturing lead time can generate numerous other benefits, including lower inventory levels, improved quality, lower costs, and lesser forecasting error.

Originality/value

Two modified scheduling rules for scheduling a dynamic job shop with SDST are proposed. The analysis of the dynamic due date assignment methods in a dynamic job shop with SDST is a significant contribution of the present study. The development of regression-based analytical models for a dynamic job shop operating in an SDST environment is a novelty of the present study.

Details

Journal of Manufacturing Technology Management, vol. 30 no. 6
Type: Research Article
ISSN: 1741-038X

Keywords

Article
Publication date: 1 January 2004

Sameh M. Saad, N. Pickett and K. Kittiaram

In this paper, an integrated model for order release and duedate management is developed to enhance manufacturers’ confidence in the duedates offered to customers. The proposed…

1235

Abstract

In this paper, an integrated model for order release and duedate management is developed to enhance manufacturers’ confidence in the duedates offered to customers. The proposed model utilised the backward finite scheduling order release control method and five different duedate assignment rules. The proposed model is implemented using C++ computer programming language. Duedate of each order is calculated by a duedate assignment rule selected. Then the program tries to schedule the whole order with as lowest value as possible of tightness parameter (k). The output of the C++ program is production schedule of the whole order using backward finite scheduling order release method. Experiment results indicate that the modified number of operations duedate rule_MNOP is superior with respect to the other duedates rules of the whole order.

Details

Journal of Manufacturing Technology Management, vol. 15 no. 1
Type: Research Article
ISSN: 1741-038X

Keywords

Abstract

Details

Advances in Accounting Education Teaching and Curriculum Innovations
Type: Book
ISBN: 978-1-84950-868-1

Article
Publication date: 23 March 2010

Mokmin Park, Dongmyung Lee, Kitae Shin and Jinwoo Park

This paper aims to enhance the responsiveness of enterprises with regard to delivery schedules in a supply chain. Based on the observations in industry, it seems that companies…

1081

Abstract

Purpose

This paper aims to enhance the responsiveness of enterprises with regard to delivery schedules in a supply chain. Based on the observations in industry, it seems that companies often re‐negotiate their duedates. These phenomena have begun to appear only recently, as a result of the advancements of information technology and flexibility in the supply chain. However, these duedate re‐negotiation processes are haphazard and ad hoc in nature, and a formal process is needed to respond to market fluctuations more quickly. In this paper, a re‐negotiable order processing method is developed that can change the already‐assigned duedates or allow partial shipments to increase the flexibility of firm response to a rush order from a prior customer (PC).

Design/methodology/approach

A duedate re‐negotiation process is defined and a formal system for handling customer orders is proposed. The new data and business process integration model are proposed for the duedate re‐negotiation process based on RosettaNet's Partner Interface Processes. Web services and ubiquitous computing technologies are used in the proposed system architecture to allow for responsive sales order management.

Findings

The paper shows that assigned duedates can also be re‐negotiated by enhancing the connectivity and visibility of the supply chain with co‐operative customers. In the early stage of the product life cycle or high‐regional demand variation environments, it is better to re‐negotiate duedates than to meet scheduled duedates.

Practical implications

In some instances, meeting the duedate requested by a customer relates to the success or failure of a particular sales order. The proposed re‐negotiation method could help the sales offices of the MF to respond to PC requests quickly and flexibly. Rush orders from PC might be acceptable based on the slack gained through the re‐negotiation of co‐operative customers' assigned orders.

Originality/value

There has been a considerable volume of studies on the duedate assignment, order releasing, and scheduling problems. However, these previous studies considered duedates as exogenous parameters or fixed endogenous variables. In this paper, the assigned duedates for pre‐contracted co‐operative customers are considered as re‐negotiable variables. On the other hand, most studies on ubiquitous computing technologies, especially those relate to radio frequency identification (RFID), have focused mostly on asset management and processing time reduction. This paper suggests other benefits of increased visibility and traceability of RFID technology in enhancing responsiveness and flexibility in the sales order management system.

Details

Industrial Management & Data Systems, vol. 110 no. 3
Type: Research Article
ISSN: 0263-5577

Keywords

Article
Publication date: 1 February 1994

T.C.E. Cheng

Under intensified pressure from both domestic and foreign competition,today′s manufacturers must strive to keep delivery promises and reducewaste. This depends largely on a…

427

Abstract

Under intensified pressure from both domestic and foreign competition, today′s manufacturers must strive to keep delivery promises and reduce waste. This depends largely on a manufacturer′s ability to assign accurate and attainable duedates. Presents an analytical method of assigning optimal total work content (TWK) duedates that minimize the average amount of missed duedates in a dynamic job shop with assembly operations. The accuracy of the method is assessed through computer simulation of a hypothetical assembly shop with different job structures under various operating conditions. While it is generally more accurate for jobs with simpler structures, the simulation results indicate that, over a range of test conditions, the method is both simple and effective in assigning optimal TWK duedates for assembly shops.

Details

International Journal of Operations & Production Management, vol. 14 no. 2
Type: Research Article
ISSN: 0144-3577

Keywords

Article
Publication date: 1 August 1998

Nabil N. Gindy and Sameh M. Saad

In this paper manufacturing responsiveness is related to the ability of manufacturing systems to utilise its existing resources to make a rapid and balanced response to the…

1123

Abstract

In this paper manufacturing responsiveness is related to the ability of manufacturing systems to utilise its existing resources to make a rapid and balanced response to the predictable and unpredictable changes. Better understanding of the inherent (hidden) flexibility that exists within a manufacturing system can therefore lead to significant improvement in system performance and responsiveness. In the reported research a conceptual framework for representing the capabilities of machine tools and machining facilities using generic capabilities units termed “resource elements” is presented as well as a mathematical basis of calculating the manufacturing system flexibility using the resource elements. Simulations are used to examine manufacturing system performance and compare resource element‐based scheduling with conventional machine‐based approaches. The results show that significant improvements in system performance and the system’s ability to cope with disturbances can be achieved if manufacturing facilities are represented and scheduled based on the resource elements concept.

Details

Integrated Manufacturing Systems, vol. 9 no. 4
Type: Research Article
ISSN: 0957-6061

Keywords

Article
Publication date: 8 May 2017

Keren Dali

The purpose of this paper is to call into question the most longstanding pedagogical practices in academia while analyzing their potential to foster student creativity and…

1328

Abstract

Purpose

The purpose of this paper is to call into question the most longstanding pedagogical practices in academia while analyzing their potential to foster student creativity and innovation in the classroom. While some suggestions advanced in this paper may not have the same importance in other fields and disciplines, they are highly relevant in the applied, interdisciplinary, and very fast moving field of Library and Information Science (LIS).

Design/methodology/approach

Positioning creativity as a teachable skill and relying on the learner-centered pedagogy of Carl Rogers, the paper presents a model that can serve as a litmus test for the creative potential of graduate-level assignments in LIS programs. The model is called “Walls,” “Doors,” and “Fences” (WalDorF); these terms refer to specific statements in graduate assignment descriptions that are necessary (“Walls”); conducive to creative expression (“Doors”); or unjustifiably restrictive (“Fences”). The paper uses a sample assignment from a “Foundations of LIS” course to illustrate the model; it also provides several examples of the WalDorF model application in other LIS courses.

Findings

Using the WalDorF model, the paper revisits and challenges some of the most common pedagogical practices in graduate LIS teaching, including the prevalence of written papers as course assignments; the implications of equating “research” with an overview of secondary literature; the need for professors’ approvals of research topics; the meaning of the “quality of writing;” the imperative of “academic” writing as opposed to other types of writing; the word/page limit; the use of standardized reference styles; the class participation requirement; and the late assignment policies, among others.

Originality/value

The real change in education is foundational and goes beyond cosmetic improvements. If we want to develop learning experiences that tap into students’ creative potential, the very core of our approaches needs to be scrutinized and questioned, even the centuries-old staples of academic teaching. At the end of the day, we may decide that changing things is not in the best interests of learning. However, a complete critical analytical work must be done to convince and reassure ourselves that tried-and-true methods are the best way to go. The proposed WalDorF model presents one possible frame for critical revision.

Details

Journal of Documentation, vol. 73 no. 3
Type: Research Article
ISSN: 0022-0418

Keywords

Article
Publication date: 1 February 2016

Anne Arendt, Angela Trego and Jonathan Allred

– The purpose of this paper is to show that cafeteria style grading actually provides a course structure which encourages students to go beyond expectations.

Abstract

Purpose

The purpose of this paper is to show that cafeteria style grading actually provides a course structure which encourages students to go beyond expectations.

Design/methodology/approach

Three instructors offered a total of 13 sections of a general education science class called “Fundamentals of Technology” from January 2012 to December 2013 using a cafeteria-style grading method. This means students get to choose to do those assignments, quizzes or tests that appeal to their own learning interests or styles and do not need to complete all the assignments to get an A grade. Rather, they complete those assignments desired in order to earn the applicable points. This paper researches the combined results of over 400 students to assess the success of cafeteria style grading.

Findings

These instructors found that half the students overall obtain an A grade and 9 percent of all students actually go above and beyond the requirements of an A grade by at least 5 percent. Actually, about 4 percent of students complete more than is required by an additional 10 percent or more.

Originality/value

Cafeteria style grading is a little researched methodology for student assessment. The research shows that cafeteria style grading actually provides a course structure which encourages students to go beyond expectations.

Details

Journal of Applied Research in Higher Education, vol. 8 no. 1
Type: Research Article
ISSN: 2050-7003

Keywords

Abstract

Details

Advances in Accounting Education Teaching and Curriculum Innovations
Type: Book
ISBN: 978-1-84950-867-4

Article
Publication date: 8 August 2016

Catherine Lantz, Glenda Maria Insua, Annie R. Armstrong and Annie Pho

The purpose of this study is to compare two bibliography assignments completed after one-shot library instruction to determine which research skills first-year students retain…

Abstract

Purpose

The purpose of this study is to compare two bibliography assignments completed after one-shot library instruction to determine which research skills first-year students retain over the course of a semester.

Design/methodology/approach

A rubric was developed for citation analysis of student-annotated bibliographies and final bibliographies. Each assignment was scored on a three-point scale, and four criteria were assessed: the quality of sources used, variety of sources used, quality of annotations (for first assignment only) and citation accuracy.

Findings

Students scored highest on the quality of sources used in both assignments, although there was a statistically significant decline in overall scores from the first assignment to the second. Students had the most difficulty with writing annotations, followed closely by citation accuracy. Students primarily cited journal articles in their annotated bibliographies and reference sources in their final bibliographies. Website use increased notably from one assignment to the other.

Originality/value

This research is unique in its analysis of two separate bibliography assignments completed by first-year students over the course of a semester. It is of interest to librarians teaching one-shot library instruction or any librarian interested in assessing the research skills of first-year students.

Details

Reference Services Review, vol. 44 no. 3
Type: Research Article
ISSN: 0090-7324

Keywords

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