（様式８）(Attached Form 8)

論文審査の要旨
Summary of Dissertation Review

博士の専攻分野の名称
Degree

学位授与の要件

Doctor of Philosophy

氏名
学位規則第４条第○1 ・２項該当Author

HAEWON NAMGUNG

論 文 題 目 Title of Dissertation
Exploring Multiple Stakeholders’ Perspectives on Resource Sharing in New Mobility Services: Toward a
System of Systems

論文審査担当者
主Dissertation Committee Members

査 Committee Chair

Professor, Akimasa Fujiwara

審査委員 Committee Member

Professor, Junyi Zhang

審査委員 Committee Member

Professor, Tao Feng

印 seal(Graduate School of Advanced Science and Engineering)

審査委員 Committee Member

Associate Professor, Makoto Chikaraishi審査委員 Committee Member

Associate Professor, Jinhee Kim(Yonsei University, South Korea)〔論文審査の要旨〕Summary of Dissertation Review
The concept of "sharing" is getting more important than other emerging service elements in regional or
rural areas. To enrich the discussion of sharing into a single frame, this dissertation connects the concept ofSystem-of-Systems (SoS) with local public transport design. This study aims to make a theoretical andpractical contribution by generating value according to the service-dominant logic with the diversified
viewpoints of multiple stakeholders.
Chapter 2 designs regional and rural public transport by considering how to incorporate individual systems
that already exist, each of which is discussed in terms of users, suppliers, and the general public. This chapter
looks at the relationship between the subsequent data and the methodologies that will support the proposed
SoS structure.
Chapter 3 explores service users' heterogeneity when sharing a vehicle's space. It is assumed that the public
transport service transports passengers and freight together within a vehicle to expand the insufficient demandin rural areas. A stated preference (SP) survey for conventional buses and integrated transportation wasconducted in a rural area in Japan. With the survey data, this chapter explores people's preferences areclassified with a heterogeneous value of time (VOT ) using latent class modeling.
Chapter 4 discusses the optimal operating direction when users with different VOT discussed above use
integrated transportation. Based on the public transport utilization ratio, destination, and time zone obtained
from the survey, the synthetic demand is simulated through the vehicle routing problem with a time window.
The objective function of the operation is to maximize the utility of the users and freights, supposing that theygather at the meeting point to increase the efficiency of the operation.
Chapter 5 discusses how multiple operators can transition to a new business through new technologies andservices from the operator's viewpoint. An SP survey was conducted on whether to provide the taxi operator
with a new business model combining new technologies/services and business implementation. Through this,the chapter figures out the barriers to the process of moving to a new business model and what can be acatalyst to transitioning to a new business model in a repopulating region in Japan. The heterogeneity ofpreferences was examined at the municipal level through classification based on Japan's local autonomy.
Chapter 6 extends the discussion from the existing link function of streets to the new space function (i.e.,surrounding infrastructure for users’ waiting places at transit stops and pedestrians’ walking environments),
by setting a stakeholder as a general public citizen. The chapter involved a survey on the people’s preferences
when a new technology that connects tram–bus and autonomous vehicle are introduced in Hiroshima city anddiscusses ways to improve the acceptability and safety of these systems.
Finally, Chapter 7 summarizes the findings of each chapter and does a cross-case analysis to propose aprototype of the System of Systems with multiple stakeholders’ roles. The limitations and the further expected
research are also discussed.
The applicant has published two reviewed papers in connection with this dissertation. Three more relevant
SCI-indexed papers are under review.
With the above evidence, all the committee members unanimously recognized that Ms. Haewon Namgung
has sufficient knowledge and ability to be awarded a Doctoral Degree of Philosophy.