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Article
Publication date: 14 September 2015

Qinming Liu and Wenyuan Lv

The traditional maintenance scheduling strategies of multi-component systems may result in maintenance shortage or overage, while system degradation information is often ignored…

732

Abstract

Purpose

The traditional maintenance scheduling strategies of multi-component systems may result in maintenance shortage or overage, while system degradation information is often ignored. The purpose of this paper is to propose a multi-phase model that better integrates degradation information, dependencies and maintenance at the tactical level.

Design/methodology/approach

This paper proposes first a maintenance optimization model for multi-component systems with economic dependence and structural dependence. The cost of combining maintenance activities is lower than that of performing maintenance on components separately, and the downtime cost can be reduced by considering structural dependence. Degradation information and multiple maintenance actions within scheduling horizon are considered. Moreover, the maintenance resources can be integrated into the optimization model. Then, the optimization model adopting one maintenance activity is extended to multi-phase optimization model of the whole system lifetime by taking into account the cost and the expected number of downtime.

Findings

The superiority of the proposed method compared with periodic maintenance is demonstrated. Thus, the values of both integrated degradation information and considering dependencies are testified. The advantage of the proposed method is highlighted in the cases of high system utilization, long maintenance durations and low maintenance costs.

Originality/value

Few studies have been carried out to integrate decisions on degradation, dependencies and maintenance. Their considerations are either incomplete or not realistic enough. A more comprehensive and realistic multi-phase model is proposed in this paper, along with an iterative solution algorithm for it.

Details

Industrial Management & Data Systems, vol. 115 no. 8
Type: Research Article
ISSN: 0263-5577

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Article
Publication date: 16 August 2022

Wenyuan Huang and Chuqin Yuan

Drawing on conservation of resources theory, this study explores the relationships of decent work (DW) with in-role performance (IRP) and organizational citizenship behavior…

1084

Abstract

Purpose

Drawing on conservation of resources theory, this study explores the relationships of decent work (DW) with in-role performance (IRP) and organizational citizenship behavior toward the organization (OCBO) by focusing on the mediating role of career satisfaction (CS) and the moderating role of supervisor ostracism (SO).

Design/methodology/approach

Hypotheses were tested using latent moderated structural equations method with two-wave data from 376 employees in a South China industrial park.

Findings

DW is positively associated both directly and indirectly, via the mediation of CS, with IRP and OCBO; the positive relationship between DW and CS is negatively moderated by SO.

Practical implications

The findings show that employee performance can be improved by implementing discernible DW activities that foster CS, but that this effect can be weakened by SO. It is, therefore, critical to create a DW environment for employees and lessen the incidence of SO in the organization.

Originality/value

This research enriches the literature by addressing the previously unexplored relationship between DW and employee performance by focusing on the mediating role of CS and the moderating role of SO.

Details

Journal of Managerial Psychology, vol. 37 no. 8
Type: Research Article
ISSN: 0268-3946

Keywords

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Article
Publication date: 20 February 2019

Jixin Han, Haibang Zhang, Juncai Sun, Wenyuan Zhao and Jinlong Cui

The purpose of this study is to improve the surface electrical conductivity and corrosion resistance of AISI430 stainless steel (430 SS) as bipolar plates for direct formic acid…

150

Abstract

Purpose

The purpose of this study is to improve the surface electrical conductivity and corrosion resistance of AISI430 stainless steel (430 SS) as bipolar plates for direct formic acid fuel cell (DFAFC).

Design/methodology/approach

The niobium diffusion layers have been successfully synthesized on 430 SS substrate by the plasma surface diffusion alloying technique under different diffusion alloying time.

Findings

The surface morphology of Nb-modified 430 SS prepared under the diffusion alloying time of 2 h is more homogeneous, relatively sleek and compact without surface micropore and other common surface blemishes. The potentiostatic and potentiodynamic polarization measurements manifest that Nb-modified 430 SS prepared under the diffusion alloying time of 2 h enormously ameliorate the corrosion resistance of bare 430 SS compared with other Nb-modified 430 SS samples and its corrosion current density is maintained at −1.4 µA cm−2 in simulated anodic environment of DFAFC (0.05 M H2SO4 + 2 ppm HF + 10 M formic acid at 50 °C).

Originality/value

The effect of diffusion alloying time on the corrosion resistance and surface conductivity of Nb-modified 430 SS has been carefully studied. The Nb-modified 430 SS samples prepared at the diffusion alloying time of 2 h have the best surface electrical conductivity and corrosion resistance in the simulated anodic environment of DFAFC.

Details

Anti-Corrosion Methods and Materials, vol. 66 no. 2
Type: Research Article
ISSN: 0003-5599

Keywords

Available. Content available
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Publication date: 13 October 2022

Raheel Nawaz and Khydija Wakil

Free Access. Free Access

Abstract

Details

Visual Pollution
Type: Book
ISBN: 978-1-80382-042-2

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