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Article
Publication date: 3 October 2019

Dharmendra B.V., Shyam Prasad Kodali and Nageswara Rao Boggarapu

The purpose of this paper is to adopt the multi-objective optimization technique for identifying a set of optimum abrasive water jet machining (AWJM) parameters to achieve maximum…

Abstract

Purpose

The purpose of this paper is to adopt the multi-objective optimization technique for identifying a set of optimum abrasive water jet machining (AWJM) parameters to achieve maximum material removal rate (MRR) and minimum surface roughness.

Design/methodology/approach

Data of a few experiments as per the Taguchi’s orthogonal array are considered for achieving maximum MRR and minimum surface roughness (Ra) of the Inconel718. Analysis of variance is performed to understand the statistical significance of AWJM input process parameters.

Findings

Empirical relations are developed for MRR and Ra in terms of the AWJM process parameters and demonstrated their adequacy through comparison of test results.

Research limitations/implications

The signal-to-noise ratio transformation should be applied to take in to account the scatter in the repetition of tests in each test run. But, many researchers have adopted this transformation on a single output response of each test run, which has no added advantage other than additional computational task. This paper explains the impact of insignificant process parameter in selection of optimal process parameters. This paper demands drawbacks and complexity in existing theories prior to use new algorithms.

Practical implications

Taguchi approach is quite simple and easy to handle optimization problems, which has no practical implications (if it handles properly). There is no necessity to hunt for new algorithms for obtaining solution for multi-objective optimization AWJM process.

Originality/value

This paper deals with a case study, which demonstrates the simplicity of the Taguchi approach in solving multi-objective optimization problems with a few number of experiments.

Details

Multidiscipline Modeling in Materials and Structures, vol. 16 no. 2
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 20 November 2023

Reddy K. Prasanth Kumar, Nageswara Rao Boggarapu and S.V.S. Narayana Murty

This paper adopts a modified Taguchi approach to develop empirical relationships to the performance characteristics (output responses) in terms of process variables and…

Abstract

Purpose

This paper adopts a modified Taguchi approach to develop empirical relationships to the performance characteristics (output responses) in terms of process variables and demonstrated their validity through comparison of test data. The method suggests a few tests as per the orthogonal array and provides complete information for all combinations of levels and process variables. This method also provides the estimated range of output responses so that the scatter in the repeated tests can be assessed prior to the tests.

Design/methodology/approach

In order to obtain defect-free products meeting the required specifications, researchers have conducted extensive experiments using powder bed fusion (PBF) process measuring the performance indicators (namely, relative density, surface roughness and hardness) to specify a set of printing parameters (namely, laser power, scanning speed and hatch spacing). A simple and reliable multi-objective optimization method is considered in this paper for specifying a set of optimal process parameters with SS316 L powder. It was reported that test samples printed even with optimal set of input variables revealed irregular shaped, microscopic porosities and improper melt pool formation.

Findings

Finally, based on detailed analysis, it is concluded that it is impossible to express the performance indicators, explicitly in terms of equivalent energy density (E_0ˆ*), which is a combination of multiple sets of selective laser melting (SLM) process parameters, with different performance indicators. Empirical relations for the performance indicators are developed in terms of SLM process parameters. Test data are within/close to the expected range.

Practical implications

Based on extensive analysis of the SS316 L data using modified Taguchi approach, the optimized process parameters are laser power = 298 W, scanning speed = 900 mm/s and hatch distance = 0.075 mm, for which the results of surface roughness = 2.77 Ra, relative density = 99.24%, hardness = 334 Hv and equivalent energy density is 4.062. The estimated data for the same are surface roughness is 3.733 Ra, relative density is 99.926%, hardness is 213.64 Hv and equivalent energy density is 3.677.

Originality/value

Even though equivalent energy density represents the energy input to the process, the findings of this paper conclude that energy density should no longer be considered as a dependent process parameter, as it provides multiple results for the specified energy density. This aspect has been successfully demonstrated in this paper using test data.

Details

Multidiscipline Modeling in Materials and Structures, vol. 20 no. 1
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 1 July 1995

P. Aravindan, S.R. Devadasan, B.V. Dharmendra and V. Selladurai

Reviews the global status of total quality management (TQM).Emphasizes continuous quality improvement as one of the main pillars ofTQM. Illustrates a part of the research that was…

1866

Abstract

Reviews the global status of total quality management (TQM). Emphasizes continuous quality improvement as one of the main pillars of TQM. Illustrates a part of the research that was carried out to examine Taguchi′s on‐line quality control (TOLQC) methods as the means to effect continuous quality improve‐ment. Describes a case study that was carried out to study the implementation feasibilities of TOLQC methods. Highlights the inferences drawn from this case study which assert the need for managerial approach rather than mere technical computations for successful implementation. Insists on intensified training and awareness programmes on the implementation strategies of these methods to attain the ultimate goals of TQM.

Details

International Journal of Operations & Production Management, vol. 15 no. 7
Type: Research Article
ISSN: 0144-3577

Keywords

Article
Publication date: 1 September 2005

S.R. Devadasan, S. Goshteeswaran and J. Gokulachandran

To provide a modified orthogonal array‐based model for enabling the researchers and practitioners to exploit the technique, “design of experiments” in an agile manufacturing…

2085

Abstract

Purpose

To provide a modified orthogonal array‐based model for enabling the researchers and practitioners to exploit the technique, “design of experiments” in an agile manufacturing environment.

Design/methodology/approach

The characteristics of Taguchi's off‐line models and agile manufacturing were studied. A theoretical model of modified orthogonal array‐based experimentation was designed. This model was subjected to implementation study in an Indian pump‐manufacturing company.

Findings

The model contributed in this paper has shown its feasibility in achieving quality in agile manufacturing environment.

Research limitations/implications

The authors are residing in an Indian city where the majority of the companies have not adopted agile manufacturing criteria. Hence, it was not possible to carry out implementation study in an agile manufacturing company. Future researchers should examine the practical validity of the proposed model in agile manufacturing companies.

Practical implications

Since the manufacturing organizations are fast becoming agile, due to the customers' dynamic demands coupled with competition, the traditional quality improvement techniques are becoming obsolete. The model contributed in this paper is found to be useful in achieving continuous quality improvement in AM environment. Hence the model would be a useful technique for today's practitioners whose activities are increasingly focused towards achieving agility in manufacturing.

Originality/value

The literature survey covering articles on agile manufacturing indicates that no researcher or practitioner has contributed a model that would exploit the technique, “design of experiments” in an agile manufacturing environment. Hence the proposed model is expected to be of high value for researchers and practitioners to explore the way of achieving continuous quality improvement in agile manufacturing environment.

Details

Journal of Manufacturing Technology Management, vol. 16 no. 6
Type: Research Article
ISSN: 1741-038X

Keywords

Article
Publication date: 2 November 2022

Dharmendra Hariyani and Sanjeev Mishra

Scarcity of resources, ecological imbalance, global warming, rising energy prices and the ever-changing need for variety have attracted the government and manufacturers for…

Abstract

Purpose

Scarcity of resources, ecological imbalance, global warming, rising energy prices and the ever-changing need for variety have attracted the government and manufacturers for sustainable development of the industries. The integrated sustainable-green-lean-six sigma-agile manufacturing system (ISGLSAMS) provides a solid platform for meeting both the customers’ variety needs and business sustainability requirements. Many organizations opted for ISGLSAMS, but still due to various barriers organizations are not able to fully implement ISGLSAMS. The purpose of this paper is to identify the barriers to the ISGLSAMS, so that a more sustainable industrial manufacturing system and industrial symbiosis can be developed.

Design/methodology/approach

A literature review, from the Web of Science and Google Scholar database, has been carried out to identify the various barriers to the implementation of ISGLSAMS in the entire value chain. A total of 168 research papers have been reviewed for identifying the ISGLSAMS barriers.

Findings

This paper elaborates the concept of the ISGLSAMS, its attributes and various barriers and contributes to a better understanding and successful implementation of ISGLSAMS to meet business’ sustainability and market performance goals in the entire value chain. The paper also projects the future research framework and directions for the ISGLSAMS, integrated sustainable-green-lean-six sigma-agile (ISGLSA) product and ISGLSA supply and value chain.

Practical implications

The study contributes to a better understanding of ISGLSAMS’ barriers. The government, stakeholders and policymakers may plan the policy, road map and strategies to overcome the ISGLSAMS’ barriers. In-depth knowledge of subclauses of ISGLSAMS’ barriers will help the practitioners to overcome the ISGLSAMS’ barriers strategically. By overcoming the ISGLSAMS barriers, a more sustainable 7 Rs based market focused manufacturing system can be designed. This will also increase the opportunities to enhance the industrial ecology, industrial symbiosis and better recovery of the product, process and supply chain residual value. This will reduce the waste to the ecosystem.

Originality/value

This work has been carried out in search of a more sustainable manufacturing system, i.e. ISGLSAMS (which is 7 Rs based, i.e. 6 Rs of sustainability with 7th R, reconfiguration) to meet the customer variety needs along with sustainability in the ever-changing customer market. This study adds value to the practitioners to identify and prioritize the ISGLSAMS’ industry-specific barriers and design the solution for the more sustainable development of (1) industries, (2) the industrial symbiosis system and (3) the ISGLSA product, process, system and supply value chain with minimum resource consumption and environmental impact. The research also contributes to the (a) ISGLSAMS (b) ISGLSA supply chain (c) reconfigurable, sustainable and modular products and (d) redesign, recovery and refurbishing of the product to increase the product life cycle.

Article
Publication date: 29 May 2020

Manimay Dev, Dinesh Kumar and Dharmendra Patel

The purpose of this paper is to identify the factors that influence hospitals’ selection by health-care insurers in India and to establish a hierarchical model representing the…

Abstract

Purpose

The purpose of this paper is to identify the factors that influence hospitals’ selection by health-care insurers in India and to establish a hierarchical model representing the relationship among different factors and their influence on the entire scenario.

Design/methodology/approach

A survey with a set of questionnaires was conducted with different health-care insurer executives of reputed health insurance companies. The data has been gathered by using a five-point Likert scale. Their opinions were converted into a reachability matrix and an interpretive structural modeling was constructed. The final results obtained were verified by using fuzzy Matriced Impacts Croises-Multiplication Applique and Classement analysis.

Findings

The results suggested three key driving factors, National Accreditation Board for Hospitals & Healthcare Providers accreditation of the hospital, purchasing power of people in the region and national and international recognition of the hospital among the eleven factors selected for the study.

Research limitations/implications

The research mainly focuses on the health insurance benefits provided by privately owned insurance companies and do not comment on any government’s mass health insurance scheme.

Practical implications

With a small proportion of people under the umbrella of health insurance in India, these factors will assist and expedite insurer’s effort to penetrate deep into rural and urban areas enhancing availability and escalating affordability.

Originality/value

This paper presents key factors responsible for better coordination between health-care systems and insurance companies.

Details

International Journal of Pharmaceutical and Healthcare Marketing, vol. 14 no. 3
Type: Research Article
ISSN: 1750-6123

Keywords

Article
Publication date: 12 March 2018

David W. Borowski, Sarah Cawkwell, Syed M. Amir Zaidi, Matthew Toward, Nicola Maguire, Dharmendra K. Garg and Talvinder S. Gill

The NHS Bowel cancer screening programme (NHSBCSP) aims to reduce colorectal cancer (CRC) cumulative mortality by up to 23 per cent; long-term outcomes at national level are not…

Abstract

Purpose

The NHS Bowel cancer screening programme (NHSBCSP) aims to reduce colorectal cancer (CRC) cumulative mortality by up to 23 per cent; long-term outcomes at national level are not yet known. The purpose of this paper is to examine a local population of CRC patients of screening age for their characteristics and long-term survival in relation to their presentation, including through the NHSBCSP.

Design/methodology/approach

Retrospective analysis of a prospectively maintained CRC database for the years 2009-2014 in a single district hospital providing bowel cancer screening and tertiary rectal cancer services.

Findings

Of 528 CRC patients diagnosed in the screening age range, 144(27.3 per cent) presented through NHSBCSP, 308(58.3 per cent) electively with symptoms and 76(14.4 per cent) as emergency. NHSBCSP-diagnosed patients were younger (median 66 vs 68 and 69 years, respectively, p=0.001), had more often left-sided cancers (59(41.0 per cent) vs 82(26.6 per cent) and 24(31.6 per cent), respectively, p=0.001), more UICC-stage I (42(29.2 per cent) vs 49(15.9 per cent) and 2(2.6 per cent)), stage III (59(41.0 per cent) vs 106(34.4 per cent) and 20(26.3 per cent)) and less stage IV disease (8(5.6 per cent) vs 61(19.8 per cent) and 34 (44.7 per cent), respectively, p<0.001). Three-year overall survival was best for NHSBCSP and worst for emergency patients (87.5 per cent vs 69.0 per cent and 35.3 per cent, respectively, LogRank p<0.001).

Originality/value

Patients diagnosed within the NHSBCSP have improved outcome compared to both symptomatic elective and emergency presentations. A reduction in overall cumulative mortality in order of 25 per cent may well be achieved, but continuing high levels of emergency presentations and undetected right-sided disease emphasise need for further improvement in public participation in the NHSBCSP and research into more sensitive and acceptable alternative screening methods.

Details

International Journal of Health Care Quality Assurance, vol. 31 no. 2
Type: Research Article
ISSN: 0952-6862

Keywords

Article
Publication date: 11 May 2022

Dharmendra Hariyani and Sanjeev Mishra

Scarcity of resources and ever-changing customer demand has driven the manufacturing organization to opt for an integrated sustainable-green-lean-six sigma-agile manufacturing…

Abstract

Purpose

Scarcity of resources and ever-changing customer demand has driven the manufacturing organization to opt for an integrated sustainable-green-lean-six sigma-agile manufacturing system (ISGLSAMS). The purpose of this study is to identify and rank the various drivers for the adoption of ISGLSAMS for the more sustainable development of the industries.

Design/methodology/approach

Using a survey questionnaire, data were collected for the 14 ISGLSAMS drivers, identified through the literature review, from 108 Indian manufacturing industries. The sign test is used to check the relevance and significance of drivers. ISGLSAMS drivers are ranked based on the median and standard deviation. A multiple regression model was employed to investigate the effects of other drivers on the highest-ranked driver to strengthen the understanding of the drivers.

Findings

Competition, customer demand, technological changes, supply chain pressure, cost benefits, incentives, top management commitment and future legislation are found the strongest drivers for ISGLSAMS. For administering the competition for ISGLSAMS policymakers must focus on the availability of organization resources, customer demand, future legislation, incentives, supply chain pressure and technological developments.

Practical implications

The study contributes to a better understanding of ISGLSAMS drivers. Through this study government, stakeholders and policymakers may plan the policy, roadmap and strategies to drive the manufacturing organizations for the adoption of ISGLSAMS for more sustainable development of industries in India.

Originality/value

This work contributes to the identification and prioritization of the drivers for the more sustainable manufacturing system, i.e. ISGLSAMS (7 Rs based, i.e. 6 Rs of sustainability with 7th R, reconfiguration). The research also contributes to the (1) ISGLSAMS literature (2) the awareness and demand of (a) ISGLSAMS (b) reconfigurable, sustainable and modular products (c) redesign, recovery and refurbishing of the product to increase the product life cycle.

Article
Publication date: 31 March 2023

Dharmendra Hariyani and Sanjeev Mishra

The purposes of this paper are (1) to identify and rank the various enablers for an integrated sustainable-green-lean-six sigma-agile manufacturing system (ISGLSAMS), and (2) to…

Abstract

Purpose

The purposes of this paper are (1) to identify and rank the various enablers for an integrated sustainable-green-lean-six sigma-agile manufacturing system (ISGLSAMS), and (2) to study their correlations and their impact on organizational performance.

Design/methodology/approach

Three tiers methodology is used to analyze the enablers for the successful adoption of ISGLSAMS. First, a total of 32 ISGLSAMS enablers are identified through a comprehensive literature review. Then, data are collected with a structured questionnaire from 108 Indian manufacturing industries. Then, an analytic approach is used to analyze (1) the relevance and significance of enablers and (2) their correlations (1) with each other, and (2) with the organizational performance outcomes, to strengthen the understanding of ISGLSAMS.

Findings

The findings suggest that top management commitment, sustainable reconfigurable manufacturing system, organization resources for 6 Rs, customers' and stakeholders' involvement, corporate social responsibility (CSR), customers and stakeholders-focused strategic alliances, dynamic manufacturing strategies, use of information and communication technology, concurrent engineering, standardized tasks for continuous improvement, virtual network of supply chain partners, real-time monitoring and control, training and education, employees' involvement and empowerment enablers are the higher level enablers for the adoption of ISGLSAMS. Findings also suggest that there is a scope for research in the incorporation of lot size reduction, Keiretsu-Kraljic supply chain relationship strategy, external collaborations with the stakeholders other than supply chain members, matrix flatter organization structure, employees' career development, justified employees' wages, government support for research fund and subsidies and vendor-managed inventory practices for ISGLSAMS. Top management commitment, sustainable reconfigurable manufacturing system, organization resources for 6 Rs, corporate social responsibility (CSR), dynamic manufacturing strategies, use of information and communication technology, concurrent engineering, virtual network of supply chain partners, real-time monitoring and control, training and education, employees' involvement and empowerment have a significant effect on (1) sustainable product design, (2) sustainable production system, (3) improvement in the sale, (4) improvement in market responsiveness, (5) improvement in the competitive position and (6) improvement in the global market image.

Practical implications

Through this study of ISGLSAMS enablers and their interdependence, and their impact on ISGLSAMS performance outcomes government, organizations, stakeholders, policymakers and supply chain partners may plan the policy, roadmap and strategies for the successful adoption of (1) ISGLSAMS in the organizational value chain, and (2) Industrial ecology and industrial symbiosis in India. The study also contributes to the industrial managers, and value chain partners a better understanding of ISGLSAMS.

Originality/value

This study is the first attempt to understand (1) the ISGLSAMS enablers and their correlations, and (2) the effect of ISGLSAMS enablers on ISGLSAMS performance outcomes to get the competitive and sustainability advantage. The study contributes to the practitioners, policymakers, organizations, government, researchers and academicians a better understanding of ISGLSAMS enablers and its performance outcomes.

Article
Publication date: 17 July 2023

Raihan Taqui Syed, Dharmendra Singh, Reena Agrawal and David Philip Spicer

Entrepreneurship has been recognized as a vital tool to combat youth unemployment and rising exclusion, as it is an incredible force that impacts economic development and societal…

Abstract

Purpose

Entrepreneurship has been recognized as a vital tool to combat youth unemployment and rising exclusion, as it is an incredible force that impacts economic development and societal growth by stimulating innovation, job creation and social empowerment. On the other hand, higher education institutions (HEIs) can foster entrepreneurship and thus develop entrepreneurial self-efficacy, self-employment, innovation, enhanced ability to risk-taking and thus result in benefiting people, society, organizations and economy. This prompted the authors to carry out an in-depth investigation of published research on entrepreneurship development and HEIs across Gulf Cooperation Council (GCC) countries.

Design/methodology/approach

This study strives to analyze the work carried out until now on entrepreneurship development in HEIs across GCC countries and describe the constructs characterizing it. Bibliometric and content analysis were carried out, integrating citations in Scopus database for last 10 years. Two software packages – Bibliometric R and VOS viewer – were used to investigate the research questions and construct various visualizations of bibliometric networks. Thematic mapping of this multidimensional research area is demonstrated, and evolving trends are identified.

Findings

Findings revealed that research on entrepreneurship development in HEIs is more prevalent in UAE and Saudi Arabia followed by Oman and Qatar. However, more efforts are required to further consolidate cross-national collaborations among all the GCC countries to obtain a comprehensive overview of the regional context.

Originality/value

Such a comprehensive bibliometric review coupled with content analysis on entrepreneurship development in HEIs across GCC countries has not yet been published, to the best of the authors’ knowledge.

Details

Journal of Enterprising Communities: People and Places in the Global Economy, vol. 17 no. 5
Type: Research Article
ISSN: 1750-6204

Keywords

1 – 10 of 44