Showing papers in "Journal of Operations Management in 1985"

TL;DR: In this paper, the authors introduce a simple example to illustrate this fact and suggest some problems that must be addressed if the theory is to encompass commonality, such as the need to develop service level measures for multiple products and to analyze the relationship between safety stock and service level.

TL;DR: In this article, the authors present an efficient computer implementation of the Wagner-Whitin algorithm, which requires low core storage, thus enabling it to be potentially useful on microcomputers.

TL;DR: In this article, the effects of various labor assignment rules on the shop's performance were examined in a dual-constrained job shop and the results showed that none of the eleven rules had a significant impact on shop performance.

TL;DR: In this article, the human aspects of the use of production cells have been evaluated by systematically examining the effect of cellular production on batch manufacturing employees and finding that cell workers were as satisfied with their jobs, supervision, and advancement opportunities as non-cell workers, but were more satisfied with pay.

TL;DR: Two important implications for managers follow from the results of the experiments: that unpaced line output rate is relatively insensitive to moderate variations from optimal task time allocations when buffer storage is limited and that perfectly balanced line designs are optimal for most cases in practice.

TL;DR: Case studies reported in this paper indicate many advantages to allowing workers to opt for different start times, to select their days off and to create non-standard workweeks from predefined sets of 6-, 8-, and 10-hour days.

TL;DR: Group Technology (GT) principles for integrating the various elements of Computer Integrated Manufacturing (CIM) are illustrated and several observations are made regarding the current state of batch manufacturing in the U.S. in light of these principles.

TL;DR: Inventory managers need to be able to gain insights to the magnitude of improvements in protection levels against stockouts that can be gleaned from the three mechanisms available to them—more buffer stock, more physical inventories, or more corrective action to eliminate or reduce the causes for the errors arising in the first place.

TL;DR: The multiproject scheduling problem is investigated under the assumption that delays corresponding to different projects carry different penalties and it is shown that problems tested must have different AUF values in order to be classified different for purposes of experimental design.

TL;DR: In this paper, the authors examined the reasons why some factories are more productive than others and found five major themes that are shared by the most productive plants: simpler flow of materials through the process, valuing people, attending to quality, investing in hardware, and accounting for the industry's productivity growth.

TL;DR: This work suggests that the short interval forecasting problems faced by many service organizations has several structural differences compared to the typical manufacturing firm in a made-to-stock environment.

TL;DR: It is obvious that the slack time can be reduced when safety stocks are planned for an MRP system, and the reduction of fixed lead-time duration will be beneficial to the overall planning and scheduling in MRP systems.

TL;DR: In this paper, the authors examined methods of reducing machine downtime costs, maintenance labor costs, and MRO inventory costs in today's changing production environment and explored techniques for reducing these costs in the areas of maintenance planning, maintenance methods improvement, and maintenance inventory control.

TL;DR: It is shown that the claim made by Sule of a novel and extremely simple algorithm yielding optimum solutions is not true, and it is concluded that planning consists of generating an array of corporate scenarios, submitting them to the “optimizing black box,” and evaluating their respective merits.

TL;DR: In this paper, the authors examined the relationship between overtime policies and spares stocking levels and the amount of overtime to use and the level in the product structure at which overtime is most beneficial.

TL;DR: This research explores one way to make MRP systems more sensitive to capacity limitations at the time of each regeneration run by designing a relatively simple heuristic algorithm for better integrating material requirements plans and capacity requirements plans.

TL;DR: This study demonstrates the need for lead time reduction, either through downward adjustment of MRP planned lead times or by introducing new manufacturing concepts, with exponential cost increases beyond the 80–90% queue time level.

TL;DR: A Markov model of spares availability at a fault-tolerant maintenance center is developed, and congestion to develop at the repair shop is allowed, making repair times longer when there are many items requiring repair.

TL;DR: The results indicated that lot-sizing procedures that fail to incorporate capacity information or that focus on a single bottleneck production stage in order to schedule production are severely limited with respect to practical and/or long-term applicability.

TL;DR: In this article, a reanalysis of the demand sequences originally published by Kaimann, and subsequently used in a number of comparative lot-sizing studies, reveals that the patterns differ not only in variability as measured by the coefficient of variation, but also in terms of correlation structure as described by the autocorrelation function.

TL;DR: Gunther, Johnson, and Peterson have discussed what needs to be considered in modeling these types of problems, providing empirical support for their arguments based on a survey of practicing engineers.

TL;DR: In this article, a series of preliminary discussions with trade specialists, consultants, and vendors, 50 industrial firms were contacted to determine if they had implemented robotics technology and participants were personally interviewed using an open-ended questionnaire.

TL;DR: A general process quality control problem has been formulated that reflects a trade-off between attaining market specified output characteristics and meeting federally regulated pollution standards and it is found that the solutions obtained under polynomial goal programming formulation are more conducive for implementation in practical quality control contexts.

TL;DR: The ProPol (production policy) process as mentioned in this paper uses correlational methods to identify where and how managers diverge from a common policy focus, which is a subjective process that is often subtle and usually hidden.

TL;DR: In this article, a quantitative method of assigning leave to crewmembers in an operational military flying squadron was developed and refined during a three-year period from 1981 to 1983, which includes a two-phase partially open bidding system.