In this thesis, we present three works on queues. In chapter 1, we analyze two non-work-conserving variations of the M/G/1 preemptive LIFO queue, focusing on deriving expressions for the limiting distribution of workload and related quantities. In the first model, preempted customers return to the front of the queue with a new service time, while in the second, they return with their original service time. We use queueing theory methods such as the Rate Conservation Law, PASTA, regenerative process theory and Little's Law. Our results include stability and heavy-traffic limits, as well as tail asymptotics for stationary workload. In chapter 2, we analyze a queueing model with price-sensitive customers, where the service provider aims to maximize revenue and minimize the average queue length. Customers arrive according to a Poisson process, join the queue if their willingness-to-pay exceeds the offered price, and are served in a first-in first-out manner with exponential service times. Our model is applicable to cloud computing, make-to-order manufacturing, and food delivery. We provide performance guarantees for a class of static pricing policies that can achieve a constant fraction of the optimal revenue with a small increase in expected queue length. We present results for the single-server, multi-server, and multi-class cases and provide numerical findings to demonstrate the empirical performance of our policies. In chapter 3, we analyze the Adaptive Non-deterministic Transmission Policy (ANTP), a technique addressing the Massive Access Problem (MAP) in telecommunications, which involves delaying packets at the points of origin to reduce congestion. We frame these delays as time spent at a "cafe" before proceeding to the service facility. We present sample-path results, giving conditions under which ANTP does not change the total sojourn time of packets, and results under a general stochastic framework, focusing on stability and constructing proper stationary versions of the model. We prove Harris recurrence of an underlying Markov process and find positive recurrent regeneration points under i.i.d. assumptions.

The purpose of this study was to explore students' perceptions of library services offered at Walters State Community College. This research involved LibQUAL+™, a nationally known academic library assessment instrument that measures three dimensions on a scale of approximately 22 aspects of service, divided into 6 groups (Heath, Kyrillidou, & Askew, 2004, p.264). These 3 dimensions are the following: Affect of Service (AS), Information Control (IC), and Library as a Place (LP). Responses of 666 students at Walters State Community College, Morristown, Tennessee, indicated the students' perceptions of acceptable minimum level of service, perceived levels of service, and desired levels of service. Each dimension was assessed by mean scores and p values to determine students' level of satisfaction with the library. Independent samples t tests were conducted to analyze the association between perceived means of the 3 service quality dimensions for the following: (1) Walters State Community College compared to 4 other community colleges, (2) male and female students at Walters State Community College, (3) traditional students 22 years old and younger and nontraditional students over age 22 at Walters State Community College. Pearson's correlation was conducted to analyze the relationship between library budgets and library services. Based on the findings of this study, Walters State Community College Library's mean scores were higher than the other 4 community college's in the 3 service quality dimensions. However, Walters State Community College's results indicated substantial room for improvement in the Affect of Service dimension. The mean scores between male and female students at Walters State College showed no differences among the 3 service quality dimensions. The findings also indicated that nontraditional students over age 22 rated Affect of Service and Information Control higher than did traditional students age 22 and younger. In addition, findings indicated a fairly strong relationship between library budget and the Information Control dimension for the 5 community colleges studied. The data offered in this study provided useful information for library self-study and ideas for improving the college's library services.

This dissertation uses service-dominant logic to understand customer value creation in service innovation context. Although co-creation became an interesting phenomenon among marketing scholars, the underlying mechanisms of co-creation process are still vague. To fill the gaps in the literature, we draw from S-D logic to understand antecedents and outcome of co-creation to service innovation context. The results of this study show that most of the hypotheses are supported, thus finding support for the overall model of value co-creation.

The purpose of this study was to identify instances when workers in a business environment used thinking skills, including creative thinking, decision making, and problem solving in a manner that was beneficial and to examine how they perceived they acquired thinking skills. Twenty-seven banking employees from nine branches were interviewed using the behavioral event interview method. The nine branches represented three banks operating in Virginia. At each branch, a manager, a new account representative, and a teller were interviewed. The behavioral event interview method was selected as it has been a successful tool in both industrial and educational settings. Additionally, its purpose is to identify competencies necessary to do a given job well. The tape recorded interviews were transcribed and yielded a total of 55 behavioral events. The events were reviewed and instances of creative thinking, decision making, problem solving, and combinations of the three were identified and coded according to definitions presented in the study. Sixty-two instances of thinking skill use were identified within the events. Instances from the interviews of creative thinking, decision making, problem solving, and combinations of these were presented. Further, two interrelated themes emerged from the instances of thinking skill use. The first theme involved the generation of new ideas, determining the best alternative, implementing an alternative, or a combination of these in order to generate business or sales for the bank. The second theme involved the generation of new ideas, determining the best alternative, implementing an alternative, or a combination of these in order to solve a known problem. This study revealed that the interviewees did not receive formal thinking skill preparation from education or work training programs. They attributed most of their thinking skill development to experience. Outcomes of this study can be used to teach thinking skills by the infusion approach, the most commonly used method for teaching these skills. It relies on the skills being taught in real-life contexts. / Ph. D.

No / The purpose of this study is to investigate the customer’s perception of service quality within the context of the pharmaceutical supply chain, and look specifically at the supplier/customer relationship. The research in question focuses on the trading relationship between a pharmaceutical wholesaler and its pharmacy customers. Existing literature shows that quality of the overall service is determined by the customer’s perceptions of that service; therefore it is important that the supplier measures the customer’s perception of service quality and understands what factors influence that perception and build this into their service delivery. The data were collected via a series of qualitative semi-structured interviews with hospital and retail pharmacies located in the North West of England. The findings show that pharmacy customers have a range of vitally important to less important criteria associated with good service quality and that pharmaceutical wholesalers as suppliers should aim to excel at the vital and important issues and meet those of lesser importance to satisfy customers expectations of service quality. This reinforces the importance of measuring customer expectations and incorporating outputs into service design to ensure a customer focus to the service provided. Further consideration should be given to adopting the SERVQUAL tool in conducting future research and analysis. Suppliers should be aware that there are vital activities that customers expect to have performed/delivered and that they need to know what these are and excel at these, whilst managing less important criteria effectively. This paper provides an insight into the customer-supplier relationship within the pharmaceutical supply chain in the NHS, which will be of benefit to practitioners and academics in this field.

The service sector of the global economy is undoubtedly growing and increasingly highlighting the criticality of service quality to enhanced profitability in most service organisations. The demand for accountability from different stakeholders, including clients, has also made service quality a highly debated, researched and most powerful competitive trend shaping marketing and business strategy. Developing reliable measurement instruments of service quality and strategies for the improvement of service quality invariably become the most important responsibilities for managers in many organisations. In the absence of conceptual clarity on service quality, divergent views on the dimensionality of service quality and the lack of a psychometrically valid service quality measure in archival institutions, this study set out to develop and subsequently validate a measurement instrument to assess service quality in an archival institutional setting. The two research questions investigated in this study were: (1) what are the dimensions for measuring service quality in archival institutions, and (2) how can the dimensions of service quality in archival institutions be measured effectively. The methodology for this study involved a two-phased qualitative and quantitative analysis addressing these two research questions. The study followed the standard psychometric procedure for developing constructs. This research has resulted in the important findings and relevant conclusions for both academics and practitioners interested in service quality in the archival environment. The service quality measurement instrument formulated is called ARCHIVqual and has three dimensions, namely (1) security of information (with 4 items), (2) integrity of information (with 3 items) and (3) usability of information (with 2 items). Besides measuring service quality in the archival environment, ARCHIVqual will also serve as a tool for conducting periodic surveys thereby identifying specific problematic areas in archival institutions. / Graduate School for Business Leadership / DBL

Text in English / The main aim of the study was to investigate the state of customer care in Public University libraries in Kenya: case study of Moi University Library. Specifically the study was set to determine the composition of customers served and extent to which their information needs were being met. It was also set out to Identify and evaluate the quality and relevance of information services/products provided. Consequently, the study was undertaken to establish if there is a customer care structure and policy in place and also to explore the customer care practices. Lastly, to determine the challenges that were encountered in the process of offering customer care program. The mixed method research was used. Data was collected in two phases, questionnaires and interview survey methods were used to collect both quantitative and qualitative data. The study established that students and academic staff were the primary customers but their needs were not sufficiently being met. Library staff were friendly and helpful but overall rating of their attitude was below expectations. The study established that the library has variety of products/services and users’ were aware them. They were also aware of the existence of customer care unit, which allowed users to make suggestions for improvement of library products/services. The study recommends that the library should be provided with resources to run the program and also it is important that the Moi University Library adopts the use of a social media (Web: 2.0/lib 2.0) for communicating and updating users on new services and products. / Information Science / M. Inf.

Submitted in fulfilment of the requirements of the Degree: Doctor of Technology: Quality, Durban University of Technology, 2012. / There is extensive focus on the practical performance of ecotourism in respect of environmentally invasive activities and the satisfaction of ecotourists in South Africa. Therefore, the purpose of the study was to evaluate the impact of quality management practices on service quality in the accommodation sector serving ecotourism destinations in KwaZulu-Natal. The study was conducted at 58 hotels within a 50 kilometre proximity to ecotourism development regions of KwaZulu-Natal province. Two separate self-administered questionnaires were designed for the hotel managers and for their guests. A quantitative approach and a census of 58 managers were conducted and the guest response of 587 was obtained using convenience sampling. The results revealed that there are mismatches in guests’ actual experience on the variables of interest for customer service quality and the importance they attach to each variable. The experience-importance findings show that most guests rated their experiences above the importance they attach to those experiences. Little attention has been paid to hotel service quality research pertaining specifically to quality-related performance. This study fills this gap by identifying congruent hotel service quality attributes and relating these to management performance by analysing the importance of these attributes for hotel-guests seeking experiences of the natural environment. The results of the study offer measures for ecotourism service quality enhancement for the ecotourists experience at the hotels and a starting point for hotel managers to optimise the service quality growth and development while protecting the resources on which they are based. Quality function deployment has emerged as a significant tool to guide hotel managers in ecotourism destinations to attain planned levels of guest service quality and formulate a well-informed and systematic framework that will advance strategies for service quality enhancement.

Submitted in fulfillment of the requirements of the Degree of Master of Technology: Marketing, Durban University of Technology, 2012. / The aim of this study is to investigate service quality at retail banks, such as Standard Bank, ABSA Bank, First National Bank and Nedbank in Durban. The four objectives of this study are set as: Firstly, to identify the level of satisfaction with customer service received from different retail banks in Durban; Secondly, to identify customers’ expectations in terms of quality services provided by retail banks; Thirdly, to ascertain the perceptions of customers towards the service provided by retail banks in Durban; Fourthly, to measure the gaps between customer expectations and perceptions of service quality, using a modified version of the SERVQUAL model. The instrument used to assess the retail bank customer’s expectation and expectations of service quality, was the SERVQUAL questionnaire, measuring expectations and perceptions according to five quality dimensions. A total of 448 students were surveyed. Quota sampling was used in this study, in order to improve representativeness. Using quota sampling involves selecting the characteristics that are required in the sample and then sampling until enough representatives of each category are achieved. Although this is a form of non-probability sampling, a quota sample can provide a good approximation to a probability sample. It means that distributing questionnaires to a certain group would be stopped after the prescribed quota is reached. Data were analysed using descriptive and inferential statistical techniques. Conclusions and recommendations were thereafter drawn from the literature and the findings of the study. The study shows that retail bank customer expectations of service quality exceeded their perceptions in the five service quality dimensions used in the SERVQUAL questionnaire. This study is also important because it will assist bank managers to convert negative perceptions to positive impressions. Consequently, customers will benefit from the improved, outstanding customer service.

published_or_final_version / Business Administration / Master / Master of Business Administration