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Article
Publication date: 13 November 2019

Jittra Rukijkanpanich and Mathurot Mingmongkol

The purpose of this paper is to enhance the performance of maintenance in a solar power plant by implementing the proactive maintenance (PaM) strategy, measured by the…

Abstract

Purpose

The purpose of this paper is to enhance the performance of maintenance in a solar power plant by implementing the proactive maintenance (PaM) strategy, measured by the availability and the total maintenance workload.

Design/methodology/approach

The prior maintenance strategy was reviewed, and then the strategy was adjusted to focus on PaM. Failure modes and effects analysis (FMEA) was a tool for analyzing the severity and occurrence of the failure modes and effects. Then, the Why‒Why analysis was used for investigating the root causes of failures. The countermeasures were drawn, and the preventive maintenance (PM) plan was revised and carried out. The total maintenance, the PaM and reactive maintenance workload, was obtained, and then the improvements were determined. The values of availability were also obtained.

Findings

Previously, the appeared maintenance strategy was not clearly defined. It seemed to have reactive maintenance coupled with PM; it was checked once a year, and corrective actions were made when something wrong was found. Then the management team observed an increase in the reactive maintenance workload, whereas the values of availability were not consistent and tended to drop. After implementing the new maintenance strategy, PaM, the total maintenance workload decreased 14 percent in one year. The average availability of the solar power plant improved from 0.9943 to 0.9969, and the values of availability had better consistency.

Practical implications

The PaM can be applied to solar power plant without limiting the prior maintenance strategy and the complexity of production or machinery. The solar power plant is a quite simple production, and most machines consist of electrical equipment and electrical circuits. The PaM supports to analyze the failure modes, the consequence of the failure events and failure effects, and to decide what should be done. Importantly, PaM can reduce total maintenance workload while the value of availability is higher and consistent.

Originality/value

This paper states how to successfully implement the PaM for the solar power plant. Previously, the plant did not have a clearly defined maintenance strategy; it was checked once a year, and it was corrected when abnormalities were detected. The PaM strategy provides tools and processes for failures and effects analysis. Although there was a more workload of PM, the total maintenance workload decreased, even in the first year.

Details

Journal of Quality in Maintenance Engineering, vol. 26 no. 4
Type: Research Article
ISSN: 1355-2511

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Article
Publication date: 12 October 2015

Erik G. Prytz, Jonas Rybing, Eric Carlström, Amir Khorram-Manesh and Carl-Oscar Jonson

The purpose of this paper is to explore the workload and shared workload awareness in a staff performing command and control (C2) work during a planned major incident (MI…

Abstract

Purpose

The purpose of this paper is to explore the workload and shared workload awareness in a staff performing command and control (C2) work during a planned major incident (MI) empirical case in Sweden.

Design/methodology/approach

Data on workload and shared awareness were collected during live C2-work using qualitative observations and in-situ interviews mixed with quantitative questionnaires.

Findings

A content analysis of the qualitative data revealed categories of workload sources. Quantified workload estimates showed changes in workload levels over time and staff roles, which were also contextualized using the results of the qualitative data. Data on shared awareness indicated that team workload awareness shifted over time according to common patterns. This study demonstrates a promising methodology to study C2-related factors during live EMS work.

Research limitations/implications

The observed variations in workload imply that research that relies only on post-task measurements of workload may be inaccurate. Future research could use this method to investigate the connection between workload and performance during different types of MIs.

Originality/value

The results can be used to inform future Göteborgsvarvet C2-teams in terms of when, why, and for whom task load changes, which would support predictive allocation of resources.

Details

International Journal of Emergency Services, vol. 4 no. 2
Type: Research Article
ISSN: 2047-0894

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Article
Publication date: 30 December 2019

Daniela Fishbein, Siddhartha Nambiar, Kendall McKenzie, Maria Mayorga, Kristen Miller, Kevin Tran, Laura Schubel, Joseph Agor, Tracy Kim and Muge Capan

Workload is a critical concept in the evaluation of performance and quality in healthcare systems, but its definition relies on the perspective (e.g. individual…

Abstract

Purpose

Workload is a critical concept in the evaluation of performance and quality in healthcare systems, but its definition relies on the perspective (e.g. individual clinician-level vs unit-level workload) and type of available metrics (e.g. objective vs subjective measures). The purpose of this paper is to provide an overview of objective measures of workload associated with direct care delivery in tertiary healthcare settings, with a focus on measures that can be obtained from electronic records to inform operationalization of workload measurement.

Design/methodology/approach

Relevant papers published between January 2008 and July 2018 were identified through a search in Pubmed and Compendex databases using the Sample, Phenomenon of Interest, Design, Evaluation, Research Type framework. Identified measures were classified into four levels of workload: task, patient, clinician and unit.

Findings

Of 30 papers reviewed, 9 used task-level metrics, 14 used patient-level metrics, 7 used clinician-level metrics and 20 used unit-level metrics. Key objective measures of workload include: patient turnover (n=9), volume of patients (n=6), acuity (n=6), nurse-to-patient ratios (n=5) and direct care time (n=5). Several methods for operationalization of these metrics into measurement tools were identified.

Originality/value

This review highlights the key objective workload measures available in electronic records that can be utilized to develop an operational approach for quantifying workload. Insights gained from this review can inform the design of processes to track workload and mitigate the effects of increased workload on patient outcomes and clinician performance.

Details

International Journal of Health Care Quality Assurance, vol. 33 no. 1
Type: Research Article
ISSN: 0952-6862

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Book part
Publication date: 10 April 2006

Georgiy Levchuk, Daniel Serfaty and Krishna R. Pattipati

Over the past few years, mathematical and computational models of organizations have attracted a great deal of interest in various fields of scientific research (see Lin &

Abstract

Over the past few years, mathematical and computational models of organizations have attracted a great deal of interest in various fields of scientific research (see Lin & Carley, 1993 for review). The mathematical models have focused on the problem of quantifying the structural (mis)match between organizations and their tasks. The notion of structural congruence has been generalized from the problem of optimizing distributed decision-making in structured decision networks (Pete, Pattipati, Levchuk, & Kleinman, 1998) to the multi-objective optimization problem of designing optimal organizational structures to complete a mission, while minimizing a set of criteria (Levchuk, Pattipati, Curry, & Shakeri, 1996, 1997, 1998). As computational models of decision-making in organizations began to emerge (see Carley & Svoboda, 1996; Carley, 1998; Vincke, 1992), the study of social networks (SSN) continued to focus on examining a network structure and its impact on individual, group, and organizational behavior (Wellman & Berkowitz, 1988). Most models, developed under the SSN, combined formal and informal structures when representing organizations as architectures (e.g., see Levitt et al., 1994; Carley & Svoboda, 1996). In addition, a large number of measures of structure and of the individual positions within the structure have been developed (Roberts, 1979; Scott, 1981; Wasserman & Faust, 1994; Wellman, 1991).

Details

Understanding Adaptability: A Prerequisite for Effective Performance within Complex Environments
Type: Book
ISBN: 978-1-84950-371-6

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Article
Publication date: 1 March 1981

VINE is produced at least four times a year with the object of providing up‐to‐date news of work being done in the automation of library housekeeping processes…

Abstract

VINE is produced at least four times a year with the object of providing up‐to‐date news of work being done in the automation of library housekeeping processes, principally in the UK. It is edited and substantially written by the Information Officer for Library Automation based in Southampton University Library and supported by a grant from the British Library Research and Development Department. Copyright for VINE articles rests with the British Library Board, but opinions expressed in VINE do not necessarily reflect the views and policies of the British Library. The subscription for 1981 for VINE is £20 for UK subscribers and £23 for overseas subscribers — subscription year runs from January to December.

Details

VINE, vol. 11 no. 3
Type: Research Article
ISSN: 0305-5728

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Article
Publication date: 1 February 1988

Edith G. Marshalleck and Edward A. Lehan

As a key component of a World Bank‐financed Administrative Reform Programme, the Government of Jamaica began a phased implementation of performance Budgeting in 1985–86…

Abstract

As a key component of a World Bank‐financed Administrative Reform Programme, the Government of Jamaica began a phased implementation of performance Budgeting in 1985–86. Under the leadership of the Finance Ministry's Budget Division. Just under 70 per cent of the Government's 50 appropriation units will have applied performance budgeting during the 1988/89 financial year. The remaining units are scheduled for conversion in 1989–90. Expressing the Government's determination to establish productivity‐oriented managerial environments throughout its administrative service, 1,000 front line supervisors have been assigned the basic responsibility for the formulation and execution of performance budgets. These “cost centre managers”, most of whom had no responsibility for budgeting in the traditional system, are going through a management skills development programme, embracing classroom instruction, practice and on‐the‐job technical assistance. Significant institutional changes are also involved including: (1) the reorientation of the Budget Division, (2) the development of Ministry budget functions, (3) the reorganisation of accounting practices to provide required support for performance budgeting, (4) the development of management services support for cost centre managers and, (5) the establishment of productivity‐oriented training programmes.

Details

International Journal of Public Sector Management, vol. 1 no. 2
Type: Research Article
ISSN: 0951-3558

Keywords

Content available
Article
Publication date: 15 December 2017

Maxim A. Dulebenets

The volumes of international containerized trade substantially increased over the past years. In the meantime, marine container terminal (MCT) operators are facing…

Abstract

Purpose

The volumes of international containerized trade substantially increased over the past years. In the meantime, marine container terminal (MCT) operators are facing congestion issues at their terminals because of the increasing number of large-size vessels, the lack of innovative technologies and advanced handling equipment and the inability of proper scheduling of the available resources. This study aims to propose a novel memetic algorithm with a deterministic parameter control to facilitate the berth scheduling at MCTs and minimize the total vessel service cost.

Design/methodology/approach

A local search heuristic, which is based on the first-come-first-served policy, is applied at the chromosomes and population initialization stage within the developed memetic algorithm (MA). The deterministic parameter control strategy is implemented for a custom mutation operator, which alters the mutation rate values based on the piecewise function throughout the evolution of the algorithm. Performance of the proposed MA is compared with that of the alternative solution algorithms widely used in the berth scheduling literature, including a MA that does not apply the deterministic parameter control strategy, typical evolutionary algorithm, simulated annealing and variable neighborhood search.

Findings

Results demonstrate that the developed MA with a deterministic parameter control can obtain superior berth schedules in terms of the total vessel service cost within a reasonable computational time. Furthermore, greater cost savings are observed for the cases with high demand and low berthing capacity at the terminal. A comprehensive analysis of the convergence patterns indicates that introduction of the custom mutation operator with a deterministic control for the mutation rate value would provide more efficient exploration and exploitation of the search space.

Research limitations/implications

This study does not account for uncertainty in vessel arrivals. Furthermore, potential changes in the vessel handling times owing to terminal disruptions are not captured.

Practical implications

The developed solution algorithm can serve as an efficient planning tool for MCT operators and assist with efficient berth scheduling for both discrete and continuous berthing layout cases.

Originality/value

The majority of studies on berth scheduling rely on the stochastic search algorithms without considering the specific problem properties and applying the guided search heuristics. Unlike canonical evolutionary algorithms, the developed algorithm uses a local search heuristic for the chromosomes and population initialization and adjusts the mutation rate values based on a deterministic parameter control strategy for more efficient exploration and exploitation of the search space.

Details

Maritime Business Review, vol. 2 no. 4
Type: Research Article
ISSN: 2397-3757

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Article
Publication date: 25 January 2011

Hakan Oktal and Kadriye Yaman

The purpose of this paper is to develop an analytical approach for workload measurement based on the task times and the changing task priorities of en route air traffic…

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Abstract

Purpose

The purpose of this paper is to develop an analytical approach for workload measurement based on the task times and the changing task priorities of en route air traffic controllers (EATC).

Design/methodology/approach

A model called Total Airspace Workload Measurement Model was developed to measure EATC workload. Turkish airspace was chosen for practical application of the model. A survey was conducted of EATC to calculate the weighting coefficients and times of different tasks defined in the model. The survey results were analyzed with SPSS 15.0. The real traffic data of Turkish airspace for two peak hours period in heavy traffic covering August 2007 was provided by the General Directorate of Turkish airports. Geomedia 6.0 was employed for the visualization of the real traffic data.

Findings

The total airspace workload during two peak hours of traffic, estimated reference sector capacity and the number of operational sector were defined and calculated to analyze the distribution of workload among sectors.

Practical implications

This study can be used for en route sector design such as decision of the number of operational sectors and planning of sectors capacity in the strategic level. Air traffic control service providers can also refer to this study for human resources and equipment planning.

Originality/value

A number of parameters and variables were defined and included in the model by taking into consideration the different service types provided by EATC. All parameters and variables were identified with the task times of the controller. This analytical approach can be applied to those particular airspaces which have different characteristics.

Details

Aircraft Engineering and Aerospace Technology, vol. 83 no. 1
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 1 September 1998

Gerald M. Knapp and Milind Mahajan

The objective of maintenance manpower planning is to have the right number of workers with the right capabilities in the right maintenance areas. In this research, a model…

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1927

Abstract

The objective of maintenance manpower planning is to have the right number of workers with the right capabilities in the right maintenance areas. In this research, a model was developed for optimizing manpower allocation by maintenance area, craft‐type, training level, and in‐house versus sub‐contracted employees, as well as selecting between a centralized versus decentralized organizational structure.

Details

Journal of Quality in Maintenance Engineering, vol. 4 no. 3
Type: Research Article
ISSN: 1355-2511

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Article
Publication date: 15 June 2012

Hooran MahmoudiNasab and Sherif Sakr

The purpose of this paper is to present a two‐phase approach for designing an efficient tailored but flexible storage solution for resource description framework (RDF…

Abstract

Purpose

The purpose of this paper is to present a two‐phase approach for designing an efficient tailored but flexible storage solution for resource description framework (RDF) data based on its query workload characteristics.

Design/methodology/approach

The approach consists of two phases. The vertical partitioning phase which aims of reducing the number of join operations in the query evaluation process, while the adjustment phase aims to maintain the efficiency of the performance of the query processing by adapting the underlying schema to cope with the dynamic nature of the query workloads.

Findings

The authors perform comprehensive experiments on two real‐world RDF datasets to demonstrate that the approach is superior to the state‐of‐the‐art techniques in this domain.

Originality/value

The main motivation behind the authors' approach is that several benchmarking studies have recently shown that each RDF dataset requires a tailored table schema in order to achieve efficient performance during query processing. None of the previous approaches have considered this limitation.

Details

International Journal of Web Information Systems, vol. 8 no. 2
Type: Research Article
ISSN: 1744-0084

Keywords

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