2023年12月19日上午，现代供应链管理研究院第94期学术论坛在明哲楼504如期举行。主讲人丁李康，现为阿尔伯塔大学商学院会计与商业分析系博士。他的主要研究领域为排队理论、客户行为、体育分析以及医疗运营等。本次报告题目为“Translating empirical state-dependent service times into queueing models”
丁李康博士就他的研究成果向在场的参会人员进行了细致而又精彩的汇报分享。到会的师生也就此展开探讨与交流，现场气氛热烈，发言踊跃，讨论深入。本次学术论坛的召开为相关领域的师生提供学术交流的平台，激发学院学者的科研热情，提升创新能力，丰富学术视野，让大家在宽松、和谐、求新的氛围中感受学术的魅力。未来，我院会继续加强高质量科研交流平台建设，促进领域内学者间的交流讨论，从而推动相关研究的发展，并为学校的双一流建设贡献力量。
【摘要】
Recent empirical studies suggest that service times in queueing settings are state-dependent due to human behaviors. Analytical studies on state-dependent queueing models assume that the parameters are given. We investigate the translation of empirical state-dependent service times into queueing model formulations. To this end, we identify two common model types from the literature, service time and service rate models, based on state dependency in service. We relate the two model types to different groups of mechanisms and show that they may be formulated from the same service times using data from published work. In addition, we show that translating service times into service rate models may result in invalid service rates, thus providing evidence against this model type and the mechanisms associated with it. For service rate models, we find that mean service times are in general not the inverse of service rates, the directional change in service rates is not always the opposite of the directional change in mean service times, and the state measurement timing may alter mean service time patterns. We provide closed-form solutions to convert service times into service rates and vice versa, and find conditions under which monotonic mean service times imply monotonic service rates and vice versa. Our results provide a guideline for researchers to select and formulate an appropriate state-dependent queueing model from service time data, and expand the scope of previously published managerial insights.
【报告人简介】
Likang Ding is a PhD candidate in the Department of Accounting & Business Analytics at the Alberta School of Business, University of Alberta. He received his bachelor's degree in Operations Management from the University of Alberta. His research interests include queueing theory, customer behavior, sports analytics and healthcare operations.
撰稿人：王戈
审核人：张颖
