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Article
Publication date: 26 July 2018

Dongwook Kim, Dug Hee Moon and Ilkyeong Moon

The purpose of this paper is to present the process of balancing a mixed-model assembly line by incorporating unskilled temporary workers who enhance productivity. The…

Abstract

Purpose

The purpose of this paper is to present the process of balancing a mixed-model assembly line by incorporating unskilled temporary workers who enhance productivity. The authors develop three models to minimize the sum of the workstation costs and the labor costs of skilled and unskilled temporary workers, cycle time and potential work overloads.

Design/methodology/approach

This paper deals with the problem of designing an integrated mixed-model assembly line with the assignment of skilled and unskilled temporary workers. Three mathematical models are developed using integer linear programming and mixed integer linear programming. In addition, a hybrid genetic algorithm that minimizes total operation costs is developed.

Findings

Computational experiments demonstrate the superiority of the hybrid genetic algorithm over the mathematical model and reveal managerial insights. The experiments show the trade-off between the labor costs of unskilled temporary workers and the operation costs of workstations.

Originality/value

The developed models are based on practical features of a real-world problem, including simultaneous assignments of workers and precedence restrictions for tasks. Special genetic operators and heuristic algorithms are used to ensure the feasibility of solutions and make the hybrid genetic algorithm efficient. Through a case study, the authors demonstrated the validity of employing unskilled temporary workers in an assembly line.

Details

Assembly Automation, vol. 38 no. 4
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 20 September 2013

Jonas Colliander and Anders Hauge Wien

Marketing literature views word-of-mouth (WOM) as unidirectional communication in which consumers transmit either positive or negative messages based on their consumption…

3086

Abstract

Purpose

Marketing literature views word-of-mouth (WOM) as unidirectional communication in which consumers transmit either positive or negative messages based on their consumption experiences. Becoming visible in online forums, however, are consumers who engage in WOM as part of interactions with other consumers. This article aims to investigate a phenomenon frequently occurring in these interactions: consumers who defend companies and brands against others' negative WOM.

Design/methodology/approach

The authors investigated the online defense phenomenon in its natural setting using an online ethnography, known as a netnography.

Findings

This study provides empirical evidence for the existence of six different defense styles, as well as details of the identified factors underlying consumers' choices of defense styles. Moreover, the authors' analysis highlights the different outcomes of various company- and brand-defending behaviors and illustrates that this consumer phenomenon can be effective in preventing the spread of negative WOM or in mitigating its impact.

Research limitations/implications

Future research could benefit from further testing the effectiveness of the various defense styles as well as investigating how to stimulate this important buffer against negative WOM.

Practical implications

Companies are increasingly allocating resources to the monitoring of online conversations so as to be able to respond to criticisms in social media. The authors' findings indicate that other consumers frequently respond to these complaints before the companies do. These company and brand defenders could replace some of the resources companies currently devote to social media.

Originality/value

The present study identifies company and brand defending as a new WOM activity, thus extending the concept of WOM beyond praising and complaining. In addition, this study suggests that consumers who counter negative messages are not necessarily loyal, as previously assumed, but rather motivated by a sense of justice or a need for self-enhancement.

Details

European Journal of Marketing, vol. 47 no. 10
Type: Research Article
ISSN: 0309-0566

Keywords

Article
Publication date: 29 July 2021

D.S. Shylu Sam and P. Sam Paul

In parallel sampling method, the size of the sampling capacitor is reduced to improve the bandwidth of the ADC.

Abstract

Purpose

In parallel sampling method, the size of the sampling capacitor is reduced to improve the bandwidth of the ADC.

Design/methodology/approach

Various low-power techniques for 10-bit 200MS/s pipelined analog-to-digital converter (ADC) are presented. This work comprises two techniques including parallel sampling and switched op-amp sharing technique.

Findings

This paper aims to study the effect of parallel sampling and switched op-amp sharing techniques on power consumption in pipelined ADC. In switched op-amp sharing technique, the numbers of op-amps used in the stages are reduced. Because of the reduction in the size of capacitors in parallel sampling technique and op-amps in the switched op-amp sharing technique, the power consumption of the proposed pipelined ADC is reduced to a greater extent.

Originality/value

Simulated the 10-bit 200MS/s pipelined ADC with complementary metal oxide semiconductor process and the simulation results shows a maximum differential non-linearity of +0.31/−0.31 LSB and the maximum integral non-linearity (of +0.74/−0.74 LSB with 62.9 dB SFDR, 55.90 dB SNDR and ENOB of 8.99 bits, respectively, for 18mW power consumption with the supply voltage of 1.8 V.

Details

Circuit World, vol. 47 no. 3
Type: Research Article
ISSN: 0305-6120

Keywords

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