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Article
Publication date: 1 March 2001

Ying‐Ni Chen and Brian H. Kleiner

States that reduction in this period of time between design and delivery of the product to the customer can lead to improved profitability, higher levels of customer…

1445

Abstract

States that reduction in this period of time between design and delivery of the product to the customer can lead to improved profitability, higher levels of customer satisfaction and increased market share. Points out that most cycle time reduction programmes are closely tied to an organization’s quality improvement programme and therefore not an isolated activity. Discusses new approaches to cycle time reductions including cycle time reduction through emphasis on loops and through re‐engineering. Provides short case studies as examples in practice.

Details

Management Research News, vol. 24 no. 3/4
Type: Research Article
ISSN: 0140-9174

Keywords

Article
Publication date: 1 January 2006

Syed Masood

This paper presents an investigation on the line balancing of an automated cylinder block production transfer line in order to reduce the total cycle time and increase…

2539

Abstract

Purpose

This paper presents an investigation on the line balancing of an automated cylinder block production transfer line in order to reduce the total cycle time and increase machine utilization in an automotive plant. Results were verified by computer simulation, which showed increased throughput and higher machine utilization as a result of line balancing.

Design/methodology/approach

Three main operation lines of the transfer line were identified as critical and having the highest cycle time and were chosen for optimisation study. Strategies of re‐sequencing of existing operations and tools were used to reduce the cycle time of these critical operations and to balance the line. Results of a simulation study using Simul8 software are also presented to demonstrate the increase in machine utilisation and throughput as a result of line balancing.

Findings

Owing to line balancing, the cycle time of cylinder block line was reduced from 293.9 to 200 s, an almost 32 per cent reduction. This also resulted in increased throughput and machine utilisation. Throughput was increased by 65 per cent. Machine utilization was found to increase at all stations, with the highest increase at one station was recorded from 48 to 95 per cent due to balancing.

Originality/value

Introduces a new application to line balancing of automotive cylinder block production line. Demonstrates that effective strategies of re‐sequencing and changing of tools can lead to more balanced production line with increased throughput and higher machining utilisation, resulting in higher productivity.

Details

Assembly Automation, vol. 26 no. 1
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 1 July 2001

Gloria Barczak and Fareena Sultan

Examines how marketing research affects cycle time (the time from product conceptualization to product introduction), in technology‐driven industries. The key research…

2166

Abstract

Examines how marketing research affects cycle time (the time from product conceptualization to product introduction), in technology‐driven industries. The key research question to be examined in this study is: how do the collection, dissemination and utilization of marketing research information affect cycle time? Focuses on the telecommunications industry as an industry in which technology often drives the dynamics in the marketplace. Presents an empirical examination of the key research question in an exploratory study of hardware firms in the telecommunications industry. The results suggest that the collection of marketing research does not impact cycle time significantly. However, increased frequency of dissemination of the information collected via marketing research can increase cycle time. Finds also that, while the utilization ofmarketing research in designing products can increase cycle time, utilization of marketing research for strategy development can actually reduce cycle time. Thus, incorporation of marketing research in new product development can aid the introduction of new products in a timely manner.

Details

Journal of Business & Industrial Marketing, vol. 16 no. 4
Type: Research Article
ISSN: 0885-8624

Keywords

Article
Publication date: 1 June 1997

Billy Ng, Bruce G. Ferrin and John N. Pearson

Reviews the literature of purchasing and transportation management to identify factors in the purchasing and transportation processes that influence a firm’s ability to…

5471

Abstract

Reviews the literature of purchasing and transportation management to identify factors in the purchasing and transportation processes that influence a firm’s ability to reduce total cycle time. Presents a model of these factors to establish a framework for guiding research into comprehensive, systematic approaches to total cycle time reduction. In addition, the total cycle time model serves as a blueprint for practitioners in evaluating, in specific organizations, the effect of the purchasing and transportation processes on total cycle time. Although much of the research reviewed herein dates to the early 1980s its consideration as part of a comprehensive, systematic examination of the total cycle time concept is new.

Details

International Journal of Operations & Production Management, vol. 17 no. 6
Type: Research Article
ISSN: 0144-3577

Keywords

Article
Publication date: 18 December 2008

Yu‐Cheng Lin, Chih‐Hung Tsai, Rong‐Kwei Li, Ching‐Piao Chen and Hsien‐Ching Chen

The definition of cycle time is the time from the wafer start to the wafer output. It usually takes one or two months to get the product since customer decides to produce…

Abstract

The definition of cycle time is the time from the wafer start to the wafer output. It usually takes one or two months to get the product since customer decides to produce it. The cycle time is a critical factor for customer satisfaction because it represents the response time to the market. Long cycle time reflects the ineffective investment for the capital. The cycle time is very important for foundry because long cycle time will cause customer unsatisfied and the order loss. Consequently, all of the foundries put lots of human source in the cycle time improvement. Usually, we make decisions based on the experience in the cycle time management. We have no mechanism or theory for cycle time management. We do work‐in‐process (WIP) management based on turn rate and standard WIP (STD WIP) set by experiences. But the experience didn’t mean the optimal solution, when the situation changed, the cycle time or the standard WIP will also be changed. The experience will not always be applicable. If we only have the experience and no mechanism, management will not be work out. After interview several foundry fab managers, all of the fab can’t reflect the situation. That is, all of them will have an impact period after product mix or utilization varied. In this study, we want to develop a formula for standard WIP and use statistical process control (SPC) concept to set WIP upper/lower limit level. When WIP exceed the limit level, it will trigger action plans to compensate WIP Profile. If WIP Profile balances, we don’t need too much WIP. So WIP level could be reduced and cycle time also could be reduced.

Details

Asian Journal on Quality, vol. 9 no. 3
Type: Research Article
ISSN: 1598-2688

Keywords

Article
Publication date: 1 January 2006

Jeen‐Su Lim, Thomas W. Sharkey and John H. Heinrichs

This study seeks to evaluate the importance of new product development cycle time for firms that have a strategy of pursuing exporting as a means of achieving and…

4031

Abstract

Purpose

This study seeks to evaluate the importance of new product development cycle time for firms that have a strategy of pursuing exporting as a means of achieving and sustaining competitive advantage.

Design/methodology/approach

A mail survey utilizing the key informant approach for selecting senior executives of US manufacturing firms was chosen because of the importance of executive involvement in international marketing strategy decisions.

Findings

This study supports the argument that faster new product development capability must be augmented for firms striving for a higher degree of export involvement. Additionally, the importance of integrating the marketing, R&D, and engineering functions to develop competitive advantage is highlighted.

Research limitations/implications

Results must be interpreted as explorative since the sample was based on US manufacturing firms. Additional research is needed to test differential effects of innovative product and modification/extension cycle time on export involvement and other indicators of performance.

Practical implications

This study demonstrates the importance of the resource‐based theory of competitive advantage, new product development cycle time as a determinant of export involvement, and competitive advantage for firms which pursue international opportunities. It suggests that product development capabilities are not a critical determining factor of the level of export involvement. The findings show that the ability to develop competitive products faster than competitors is a prerequisite for export involvement.

Originality/value

This study suggests that the speed of new product development is a precondition for export involvement and that the new product development cycle time measures were significantly related to the perception of a firm's overall competitive position in global markets.

Details

European Journal of Marketing, vol. 40 no. 1/2
Type: Research Article
ISSN: 0309-0566

Keywords

Article
Publication date: 16 May 2019

Perry John Forsythe and Samad M.E. Sepasgozar

A problematic issue for new approaches to prefabricated timber construction is simply that there is insufficient productivity measurement data to assist estimation of…

Abstract

Purpose

A problematic issue for new approaches to prefabricated timber construction is simply that there is insufficient productivity measurement data to assist estimation of resource usage, speed onsite and best practice. A lack of information potentially results in increased pricing behaviour which may slow the uptake of prefabricated construction. The purpose of this paper is to measure installation productivity onsite for prefabricated timber floor cassette panels and develop sufficient understanding of the process to suggest improved practices.

Design/methodology/approach

A time and motion approach, paired with time-lapse photography was used for detailed capture of prefabricated cassette flooring installation processes onsite. An emphasis was placed on work flow around crane cycles from three case study projects. Time and date stamping from 300 crane cycles was used to generate quantitative data and enable statistical analysis.

Findings

The authors show that crane cycle speed is correlated to productivity including gross and net crane time scenarios. The latter is refined further to differentiate uncontrolled outlying crane cycles from normally distributed data, representing a controlled work process. The results show that the installation productivity rates are between 69.38 and 123.49 m2/crane-hour, based on normally distributed crane cycle times. These rates were 10.8–26.1 per cent higher than the data set inclusive of outlier cycles. Large cassettes also proved to be more productive to place than small.

Originality/value

The contribution of this research is the focus on cranage as the lead resource and the key unit of measure driving installation productivity (in cassette flooring prefabricated construction), as distinct from past research that focuses on labour and craft-based studies. It provides a different perspective around mechanisation, for resourcing and planning of work flow. Crane cycles provide a relatively easy yet reliably repeatable means for predicting productivity. The time-lapse photographic analysis offers a high degree of detail, accuracy and objectivity not apparent in other productivity studies which serves to enable quantitative benchmarking with other projects.

Details

Engineering, Construction and Architectural Management, vol. 26 no. 4
Type: Research Article
ISSN: 0969-9988

Keywords

Abstract

Details

Transportation and Traffic Theory in the 21st Century
Type: Book
ISBN: 978-0-080-43926-6

Article
Publication date: 28 September 2022

Hongyang Wang and Quansheng Sun

Polyurethane concrete has a high strength-to-weight ratio in the short term, and the strength-to-weight ratio stage during the maintenance period is critical. Freeze-thaw…

Abstract

Purpose

Polyurethane concrete has a high strength-to-weight ratio in the short term, and the strength-to-weight ratio stage during the maintenance period is critical. Freeze-thaw cycles have a noticeable damaging effect on the durability of polyurethane concrete. The engineering specification of polyurethane concrete with incomplete hydration reaction must be studied, as well as the development of internal structure during curing. In this paper, the polyurethane concrete tests were set up under eight distinct maintenance settings based on the climate features of the northern area and the service environment. The test results were evaluated to determine the effect of the number of early freeze-thaw cycles and the time node of early freeze-thaw cycles on the mechanical characteristics of polyurethane concrete, which revealed that the time node of freeze-thaw damage impacted the freeze-thaw resistance of polyurethane concrete susceptible to early freeze-thaw damage.

Design/methodology/approach

The early-age freeze-thaw damage polyurethane concrete was experimentally studied by controlling the time node of the freeze-thaw cycle and the curing environment. The test considered the time node, frequency of freeze-thaw damage of polyurethane concrete and the influence of subsequent curing environment and observed the mass change, relative dynamic elastic modulus, relative durability index, compressive strength and apparent damage of polyurethane concrete. The early mechanical properties of polyurethane concrete were studied by analyzing the change of numerical value. The microscopic mechanism of strength formation of polyurethane concrete was analyzed by XRD, FTIR and SEM image.

Findings

The closer the time of freeze-thaw damage was to the specimen hardening, the worse the mechanical properties and structure were, according to SEM photographs. For specimens with serial number of 12-groups, its compressive strength is only 82.39% of that of the standard group, even if the curing process continues after 20 times thawing, which increased early environment exacerbate strength loss in polyurethane concrete and also reduced freeze-thaw resistance. The findings of the tests reveal that curing can restore the freeze-thaw resistance of damaged polyurethane concrete. Curing in water has a better recovery impact than curing in air; the mechanical properties can be restored by sufficient re-curing time and good re-curing conditions.

Originality/value

By studying the freeze-thaw cycle test and test results of polyurethane concrete in different curing time nodes, the relationship between the mechanical properties of polyurethane concrete and the time node, number of freeze-thaw cycles, and subsequent maintenance environment was explored. Considering the special mechanism of strength formation of polyurethane concrete, the polyurethane concrete damaged by freeze-thaw has the ability to continue to form strength under subsequent maintenance. This experimental study can provide an analytical basis for the strength formation and reconditioning of polyurethane concrete structures subjected to freeze-thaw environments during the curing time under extreme natural conditions in fall and winter in actual projects.

Details

Multidiscipline Modeling in Materials and Structures, vol. 18 no. 5
Type: Research Article
ISSN: 1573-6105

Keywords

Abstract

Details

Nonlinear Time Series Analysis of Business Cycles
Type: Book
ISBN: 978-0-44451-838-5

1 – 10 of over 91000