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The purpose of this paper is to provide simulation modelling for bulk arrival bulk service queueing system involved in a textile industry and analyze the performance metrics.

This paper describes the simulation modelling of a bulk queueing system with limited number of admissions and multiple vacations. The model is developed for the proposed queueing system using Flexsim 2017, and it is explained through an application observed in a textile industry involving the process of cone winding.

In this paper, the simulation model has been developed to study the behaviour of queues at different resources in a production system. Various performance measures such as average components, average waiting time, total number of inputs and outputs, processing time and idle time involved in a textile industry are evaluated using simulation and justified through numerical illustration.

The proposed simulation model may be used in various scenarios wherever a real time situation exists related to bulk queueing system. The results produced in this paper can be used by the manufacturing industries to enhance the need-based accuracy. It is worth pointing out that the findings are of direct practical relevance and can be successfully used for a number of industrial applications.

The approach suggested in this paper attempts to deal with the queueing system involved in a textile industry and provides numerical results in less time with less computer resources. It provides a reasonably good approximation for simple and complex queueing models where it is difficult to find closed form of theoretical results.

The purpose of this study is to provide a nuanced understanding of Chinese family tourists’ value co-creation by examining three important aspects of family vacation: What do families do during vacation? How do they make meaning of what they do? Do travelers’ role identities within their families play a role in the value creation process?

Upon reviewing related theoretical work, the authors undertook a mixed-method study consisting of both survey data and in-depth interviews.

The analysis revealed three clusters of family interactional content, including We open and share our worlds, We build knowledge and skills and We co-create and co-evaluate, and five clusters of family travelers, including Outdoor enthusiasts, Socializers, Nature lovers, Culture admirers and Relaxation seekers. Family roles, life situations and destination environments also interfaced with family activity participation and family conversations. A family vacation value co-creation process framework with four propositions was, thus, proposed.

Further exploration and validation of the proposed framework and propositions which emerged from the findings of this study are needed. Impacts of various family types and relational dynamics also warrant future investigation.

The results of family interactional and relational well-being facilitated by family vacation are pertinent to academia, industry and public policy-making.

Family vacation can be a positive intervention for the creation of family value and a means of meaning-making. Programs that integrate multiple family roles and address family-level value propositions would be collectively enriching.

The current study initiated a pioneering investigation by providing a depiction of how family travelers experience and make sense of a shared tourism experience, along with their value perceptions in such a co-created consumptive scenario.

This paper aims to study the maintenance and replacement problem for a deteriorating repairable system with multiple vacations of one repairman. It proposes a new replacement policy and establishes corresponding replacement models.

It is assumed that the repair after the system failures is not “as good as new” and the repairman is in multiple vacations. The reaching of the effective age of the system is assumed to be mutually stochastic at working state, waiting state for repair and being repaired state. Under these assumptions, a replacement policy based on the effective age of the system is applied. The long-run expected downtime per unit time and the long-run expected profit per unit time as objective functions are chosen, respectively. By using geometric process theory and renewal process theory, the mathematic models have been established and the explicit expressions of the long-run expected downtime per unit time and the long-run expected profit per unit time are derived, respectively.

The optimal replacement policy can be calculated and determined by the computer to minimize the expected downtime or maximize the expected profit. The minimum expected downtime per unit time and maximum expected profit per unit time can also be determined.

This replacement policy and mathematic models can be used as reference to the failure system maintenance and replacement.

Technological advancements and growing complexity of many real-time systems, namely, communication, transportation, defense systems, etc., necessitate the importance to adopt a well-planned repair process such as phase type quasi-renewal process contributing to an improved system performance. Further, in an attempt to boost the role of maintenance as a financial benefactor, repairman’s multiple vacation policy is incorporated. Also, the significance of the degree of repair is illustrated while indicating the suitability of the matrix-analytic approach via the phase type quasi-renewal operating/repair times in reliability. The paper aims to discuss these issues.

The optimal replacement policy is obtained by employing the matrix-analytic method and minimum average cost rate.

The considered models make a significant contribution towards establishing that the matrix-analytic method, using the phase type quasi-renewal process, aids in reducing the computations and also fills the gap in the literature in the study of deteriorating systems. Availability and rate of occurrence of failures are evaluated in transient and steady-state regime.

This model differs from the existing models, in that, a repairman’s multiple vacation, delayed repair time and representation of the failure occurrence by a mixed Poisson process have been incorporated into the analysis. Also, time-dependent case and N-policy have been adopted to explore the optimality issues using phase type quasi-renewal process analytically. The numerical illustrations warrant that the maintenance policy proposed in this paper produces a considerably lower cost.

The purpose of this study is to explore consumer anticipation processes that occur after commitment to a purchase has been made, but before consumption occurs. The authors add to the knowledge and theory building about anticipation that occurs in this liminal phase by investigating the cognitive, emotional and behavioural processes that interact to influence post-consumption evaluations.

An abductive research approach used a phase-based research design using semi-structured interviews. The authors identify interactions between cognitive, emotional and behavioural processes that occur during anticipation and associate these with post-consumption outcomes.

Anticipation of a consumption experience, enacted through thoughts, emotions and actions, and undertaken with peers, is an experience per se, independent from and interdependent with the substantive experience, and contributes to performance of the substantive experience. The authors propose a framework in which anticipation – as a performative phenomenon – influences the overall evaluations of the substantive consumption experience in contexts of delayed consumption. The theoretical grounding of performativity makes a useful contribution through its linkage of thought processes to outcomes. The authors further locate their findings within the literature on attribution theory. By engaging in anticipation, informants perceived the locus of causality to be internal, and expressed pride in having anticipated if the subsequent experience was successful. By anticipating, informants perceived an ability to exert control over future events and felt ashamed of not having adequately anticipated if an experience was subsequently unsuccessful.

The theoretical grounding of performativity makes a useful contribution through its linkage of thought processes to outcomes. The authors further locate their findings within the literature on attribution theory. By engaging in anticipation, informants perceived the locus of causality to be internal and expressed pride in having anticipated if the subsequent experience was successful. By anticipating, informants perceived an ability to exert control over future events and felt ashamed of not having adequately anticipated if an experience was subsequently unsuccessful.

The authors discuss the trade-off service providers face between encouraging anticipation, which raises expectations that might not be met, and facilitating anticipatory preparations, which may reduce the risk of service failure.

The authors provide a new lens by conceptualising anticipation as a performative process and identifying mechanisms by which anticipation is embedded in total consumption experience. This study has important generalisable implications for contexts where mechanisms of performative anticipation may be a means for ameliorating uncertainty about future consumption experiences.

This paper aims to consider a single server queue with system disasters and impatience behavior are evident in our daily life. For this purpose, authors require to know the general behavior of these systems. Transient analysis shows for us how the system will operate up to some time instant t.

In this paper, authors consider a single server queue with system disaster and impatient behavior of customers in a multi-phase random environment, in which the system transits to a repair state after each system disaster. When the system is in a failure phase or going through a repair phase, the new arrivals would be impatient. In case the system is not repaired before the customer’s time expires, the customer would leave the queue and never return. Moreover, after repair, the system becomes ready for service in an operative phase with probability $q_{i} \ge 0.$. Using generating functions along with continued fractions and some properties of the confluent hypergeometric function, authors obtained on their own results.

Explicit expressions have been obtained for the time-dependent probabilities of the underlying queuing model. Also, time-dependent mean and variance of customers in the system are deduced.

The system authors are dealing with is somewhat complicated, there are some performance measures that cannot be achieved, but some of them have been obtained, such as the expectation and variance of the number of customers in the system.

Based on the obtained results, some numerical examples are some numerical examples are presented to illustrate the effect of various parameters on the behavior of the proposed system.

Authors’ studied transient analysis of a single server queue with system disaster and impatient customer system is suitable for behavior interpretation of many systems in our lives, such as telecommunication networks, inventory systems and impatient telephone switchboard customers, manufacturing system and service system.

To the best of the author’s/authors’ knowledge and according to the literature survey, in a multi-phase random environment, no previous published article is presented for transient analysis of a single server queue with system disaster and impatient customer behavior in a random environment.

The purpose of this paper is to study the performance metrics of redundant repairable machining system which is applicable in various systems like computer and communication system, manufacturing and production system, etc.

In the present investigation, the authors develop Markov model for the system consisting of identical active operating machines which are prone to breakdown. The operating machines are under the care of one permanent repair facility that provides time-sharing basis repair services. The maintenance is facilitated with the provision of standby machines of mixed type and permanent as well as additional repair facility. From the economic point of view, F-policy and N-policy to control the service and arrival of failed machines effectively are included.

For the performance analysis of the system in long run, the authors compute steady-state probabilities using product-type solution method recursively. Sensitivity analysis is performed numerically for various parameters by developing code in MATLAB.

The performance prediction done may be helpful for the system designers and decision makers for the improvement of the existing machining systems in various industries.

Markovian model for the performance prediction of fault tolerant multi-identical operating and standby machines redundant system is developed in generic frameworks by incorporating many noble features which were not all taken together by other researchers working on the same lines. The key concepts incorporated for the modeling of the concerned system is: F-policy, N-policy, time-sharing, and sensitivity analysis of availability and cost function.

A growing number of human rights NGOs have placed international volunteers in conflict zones from Guatemala and Colombia to Palestine and Iraq. This study samples from contemporary high-risk transnational activists and highlights the variation in biographical steps taken toward the shared outcome of participation in human rights work (HRW). Data was collected through 6 weeks of participant observation in Israel-Palestine, 21 in-depth interviews, and 28 shorter focused interviews with human rights workers (N=49). Oversampling from the International Solidarity Movement reveals how the unique constraints and opportunities presented by a particular conflict zone and NGO culture impacts self-selection into HRW. Grounded theory and Boolean methodology aided in identifying four main pathways (the nonviolent activist, peace church, anarchist, and solidarity pathways) to HRW as well as biographical patterns and complexities that have been underemphasized in the existing literature. These include the salience of transformative events and attitude changes in the process of constructing a cosmopolitan identity and committing to high-risk transnational activism.

Drilling rig work is dangerous, repetitive, and both physically and emotionally taxing, but is attractive to many workers because it affords a means whereby those lacking postsecondary education are able to earn high salaries while still in their twenties and thirties. This chapter examines the workplace culture of the personnel at a number of rig sites in Alberta, Canada. It focuses on the ways in which workers speak about their own motivations and goals and discusses the verbal norms surrounding safety and accidents. It concludes that – the insistence on “money” as the prime motivator in the workers' folk model notwithstanding – there are significant personal rewards inherent in being an accepted member of the production team.

Human life has been unfavourably impacted by COVID-19, which has impacted the entire planet. Contrastingly, it is now crucial to discern the significance of health in human life and pay more attention to protecting health. Owing to COVID-19's influence on lifestyle, it is evident that the pandemic contributes to the development of health tourism and that wellness tourism, which was in the pre-pandemic growth trend, is favoured more often. Therefore, it is indisputable that stakeholders in the health and tourism industries view the rising demand for health-focused holidays as a potential. However, on the opposite hand, it is meaningful to broaden the number of products made available within the context of wellness tourism, to pinpoint areas that are conducive to health-related activities, to generate the infrastructure and superstructure required in these areas and to step up marketing initiatives in order to make the most of this opportunity. To address these concerns, it is deemed crucial that the parties involved in the tourism and health sectors coordinate their efforts.