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1 – 8 of 8Linet Özdamar, Gündüz Ulusoy and Mete Bayyigit
Considers the resource‐constrained project scheduling problem where cash inflows and outflows are tied to the occurrence of events. The objective is the maximization of the…
Abstract
Considers the resource‐constrained project scheduling problem where cash inflows and outflows are tied to the occurrence of events. The objective is the maximization of the project net present value (NPV) as well as the minimization of project tardiness in the presence of a project due date. Develops hybrid scheduling rules with both NPV and tardiness considerations to enhance both objectives. Experiments extensively with a set of benchmark problems originally designed for the objective of minimizing the project duration. Demonstrates that thje hybrid rules developed here are superior in performance with respect to both objectives when compared with well known rules which are developed for the two objective of minimizing the project duration. Demonstrates that the hybrid rules developed here are superior in performance with respect to both objectives when compared with well‐known rules which are developed for the two objectives taken individually. Furthermore, the iterative algorithm improves the performance of all tested rules significantly.
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Gündüz Ulusoy and Linet Özdamar
Proposes a heuristic iterative scheduling algorithm for theresource constrained project scheduling problem. Considers a generalmodel where activities are represented by multiple…
Abstract
Proposes a heuristic iterative scheduling algorithm for the resource constrained project scheduling problem. Considers a general model where activities are represented by multiple operating modes and each operating mode is constituted of different activity durations and resource requirements. The performance measures considered are the minimization of project duration and the maximization of net present value (NPV). In the cash flow model assumed, activity expenditures take place at their start times and the project payment is made on its completion. The iterative scheduling algorithm consists of forward/ backward scheduling passes, where consecutive scheduling passes are linked by updated activity time windows. The iterative algorithm is supported by a conflict‐based activity selection technique called local constraint based analysis (LCBA). A considerable amount of improvement in both performance criteria is observed when the results of the iterative algorithm are compared with the results given by the initial forward schedule.
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Reports on a benchmarking study conducted to quantify how well companies operating in various sectors of Turkish industry match up to best practice, both in the practices they…
Abstract
Reports on a benchmarking study conducted to quantify how well companies operating in various sectors of Turkish industry match up to best practice, both in the practices they adopt and in the operational outcomes that result, and to test the hypothesis that the closer a company is to best practice, the more likely it is for that company to achieve higher business performance. The survey conducted in 1997 and 1998 included 82 companies from the Turkish electronics, cement, automotive sectors and part and component suppliers to the appliance industry. For data gathering, employs the Competitive Strategies and Best Practices Benchmarking Questionnaire, supported by some follow‐up interviews and one‐day site visits. Classifies two small groups of companies as leaders and laggers, depending on how close they were to best practice. Shows that the leaders have performed better than the laggers in adopting best manufacturing practices and in the achievement of high performance levels. The leaders also have achieved substantially higher business performance than the laggers. Furthermore, observes that large‐sized companies outperform the rest both in terms of their success in implementing best manufacturing practices and in achieving high operational outcomes and that there is no appreciable difference between industrial sectors in implementing best manufacturing practices and in achieving high operational outcomes.
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Dilek Cetindamar and Gunduz Ulusoy
This paper aims to shed light on the relationship between partnerships and innovation efforts of the firms. The goal is to understand whether Turkish firms collaborate for…
Abstract
Purpose
This paper aims to shed light on the relationship between partnerships and innovation efforts of the firms. The goal is to understand whether Turkish firms collaborate for innovation or not and, if they do, what is the impact of partnerships on the innovation performance of firms?
Design/methodology/approach
In this research, a survey methodology is employed. The questionnaire is implemented through structured interviews conducted with 135 Turkish companies from the textile, chemical, food and machinery industries.
Findings
The findings show that Turkish firms have high‐collaboration ties with other companies in particular but the existing partnerships have a weak impact on innovation performance.
Research limitations/implications
As only one country is studied and data come from one year, the findings of this study are limited in terms of generalizing the results for a wide variety of developing countries.
Practical implications
Non‐materialized performance is to a degree due to low quality of relationships, but more importantly Turkish firms need to find ways to improve their partnerships and in‐house capabilities, particularly their absorptive capacities, if they want to improve their innovativeness through partnerships.
Originality/value
This paper is one of the early examples empirically investigating the relationship between technology collaborations and innovation performance of firms in a developing country context.
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Lutfihak Alpkan, Cagri Bulut, Gurhan Gunday, Gunduz Ulusoy and Kemal Kilic
The main purpose of this paper is to investigate the direct and interactive effects of organizational support and human capital on the innovative performance of companies…
Abstract
Purpose
The main purpose of this paper is to investigate the direct and interactive effects of organizational support and human capital on the innovative performance of companies. Individual effects of the organizational support dimensions, namely: management support for generating and developing new business ideas, allocation of free time, convenient organizational structures concerning, in particular, decentralization level or decision‐making autonomy, appropriate use of incentives and rewards, and tolerance for trial‐and‐errors or failures in cases of creative undertakings or risky project implementations, are also to be investigated.
Design/methodology/approach
The study develops and tests a theoretical research model where the organizational support dimensions are the independent variables, innovative performance is the dependent variable, and the human capital has a moderating role in this relationship, via a questionnaire study covering 184 manufacturing firms in Turkey.
Findings
Among the individual direct effects of the dimensions of organizational support, management support for idea development and tolerance for risk taking are found to exert positive effects on innovative performance. Availability of a performance based reward system and free time have no impact on innovativeness, while work discretion has a negative one. As for the role of human capital (HC), it is found to be an important driver of innovative performance especially when the OS is limited. However, when the levels of both HC and OS are high, innovative performance does not increase any further.
Originality/value
Two distinct research streams, namely organizational support literature and human capital literature, have already focused on their individual impacts on the innovative performance. However, a combination of these separate streams was not tried before. The paper discusses and investigates what will happen when both positive drivers interact with each other. Moreover, it also investigates how organizational support and human capital are complementary.
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Mehmet Bağış, Mehmet Nurullah Kurutkan and Liridon Kryeziu
This research aims to determine the contribution of publications in the context of Türkiye to the international entrepreneurship literature between 2005 and 2022. We examined 471…
Abstract
This research aims to determine the contribution of publications in the context of Türkiye to the international entrepreneurship literature between 2005 and 2022. We examined 471 articles published in international journals in the Web of Science (WoS) Core Collection database using bibliometric analysis techniques. We analyzed the data with the software Biblioshiny+Bibliometrix, SciMAT, and VOSViewer. We used performance, theme and evolution, co-authorship, and document analysis in data analysis. Performance analysis findings show that the most publications were made in 2021, the journal with the most publications was sustainability, and the author with the most publications was Bakır, C. Theme and evolution analysis revealed that the motor themes were corporate entrepreneurship, gender and entrepreneurial intentions in the first period (2005–2014), while institutional entrepreneurship stood out as the niche theme. In the second period (2015–2022), “corporate entrepreneurship” and “performance” emerged as the motor themes, while the niche themes in this period were “Syrian refugees” and “entrepreneurial intentions.” Document analysis findings show that the most studied entrepreneurship types are gender, family, corporate, social, and small business, respectively. In addition, immigrant/refugee entrepreneurship is emerging as a new topic, while indigenous entrepreneurship, informal entrepreneurship, sustainable entrepreneurship, and religion entrepreneurship are the most minor studied topics in entrepreneurship. Evidence-based decision-making inputs were obtained for those holding the resource allocation authority in Türkiye. Policymakers and funders, as well as individuals and institutions that want to design the future in terms of resources, can benefit from the findings and analysis of this chapter. Türkiye, which ranks 26th in the world regarding entrepreneurship, must develop a policy based on data.
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Murat Gunduz, Abdulla M. Abumoza and Aly Abdelfattah Aly
The aim of this paper is to study the effect of strategic and project related potential risks on project delivery in Qatar. Two objectives have been defined. The first is to…
Abstract
Purpose
The aim of this paper is to study the effect of strategic and project related potential risks on project delivery in Qatar. Two objectives have been defined. The first is to identify potential risk indicators (manifest variables) and categorize them (constructs/latent variables) based on a literature review, while the second is to examine and rank the relationships between the indicators and constructs by developing a structural equation model.
Design/methodology/approach
Twenty-five indicators were identified from the literature review and categorized into five groups. To collect the data, an online questionnaire was distributed in Qatar, and 116 responses were obtained. Structural equation modeling (SEM) was used to examine the model. The model that was developed based on the research hypothesis met goodness-of-fit, reliability and validity requirements.
Findings
The results showed that all constructs contributed well to the model and that the project parties (PPs) have the highest contribution with an effect weight of 0.209 followed by economic and legal (EL) conditions with an effect weight of 0.205. Site and safety (SS) conditions were third with an effect weight of 0.200 while environmental, natural and technological (ENT) conditions were fourth with an effect weight of 0.1989. The last ranked construct is political and social (PS) conditions with an effect weight of 0.186. Based on the outcome of the SEM, recommendations were provided to industry professionals in Qatar about mitigating the impact of potential risks on construction project.
Originality/value
To the authors' best knowledge, this is the first study to quantify the effects of strategic and project related risks on a construction project using SEM, considering the risk management indicators of SS, EL, ENT, PS in Qatar. The study's practical implications are to enlarge the project's risk management plan by considering the strategic and project related risks to enhance the project performance for the cost overrun and delay. The study is intended for construction projects in Qatar, but it can easily be adapted to other parts of the world given the local circumstances.
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Michael E. Odigie, M. Affan Badar, John W. Sinn, Farman Moayed and A. Mehran Shahhosseini
The purpose of this paper is to develop an optimal model of an integrated quality and safety management system (QSMS).
Abstract
Purpose
The purpose of this paper is to develop an optimal model of an integrated quality and safety management system (QSMS).
Design/methodology/approach
Keywords related with these systems were identified from international standards and subsequently mined from a selection of peer reviewed articles that discuss and propose varying forms of integrated models for both systems. Cluster analysis was used to establish the degree to which integrated models, as described in the articles were quality dominant vs safety dominant. Word counts were utilized for establishing content and attributes for each category. An optimal integrated model was developed from the final cluster analysis and substantiated by a one-way analysis of variance. Experts from industry were consulted to validate and fine-tune the model.
Findings
It was determined that characteristics of an optimal integrated model include the keywords “risk,” “safety,” “incident,” “injury,” “hazards,” as well as “preventive action,” “corrective action,” “rework,” “repair,” and “scrap.” It also combines elements of quality function deployment as well as hazard and operability analysis meshed into a plan-do-check-act type work-flow.
Research limitations/implications
Given the vast array of clustering algorithms available, the clusters that resulted were dependent upon the algorithm deployed and may differ from clusters resulting for divergent algorithms.
Originality/value
The optimized model is a hybrid that consists of a quality management system as the superordinate strategic element with safety management system deployed as the supporting tactical element. The model was implemented as a case study, and resulted in 13 percent labor-hour saving.
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