Makoto Ioki’s research while affiliated with Keio University and other places

This study analyzed the relationship between prototyping and team creativity based on quantitative data on prototyping and team creativity and qualitative data obtained from semi-structured interviews with participants in a design project related to the early stages of new product development conducted at a graduate school.

To indicate the effective team-building activities implemented independently by the students in a project-based learning class in higher education in Japan, we conducted semi-structured interviews with the students of the Design Project class held at a Japanese graduate school in 2020 and 2021. The interviewees are 12 students belonging to the top three teams regarding the evaluation of the final presentation. Based on the classifications of the comments, we indicate the best practices of team-building activities corresponding to the timing and team characteristics.

It is necessary to enhance team performance by unleashing each member's abilities in order to achieve the goal in business collaboration situations. However, it is a problem when each member does not recognize its strengths to demonstrate and the team performance is not enhanced. The purpose of this study is to enhance team performance by making each member able to recognize and unleash its abilities. We propose a method that aims to make individuals understand their situations through an advice sheet from the third person outside the team. In particular, the advice writer gives a description of advice to the team and individuals, based on the pre-survey that individuals answered their role recognition of themselves and team members. The method is evaluated by the change in self-acceptance and acceptance of others. The result indicates that the proposed method improves the acceptance level of examinees with low self-acceptance and acceptance of others at the pre-survey, who are the target of this study. The analysis of the free descriptions identifies that acceptance of others follows after self-acceptance. We also indicate the effects of the advice sheet to change self-acceptance and acceptance of others through the analysis of the interviews with the five examinees.

This study proposes an assurance case description method based on the framework of In-formation Security Management System (ISMS; ISO 27001). The method agrees to information security policies through co-creation of values between a parent company and its merged and acquired subsidiary. Information security policy varies among companies. Parent companies need to agree with their merged or acquired companies on the information security policies. The purpose is to maintain the existing business of the subsidiaries while the parent companies continue to use the current IT infrastructure and network. This study first structuralizes ISO 27001 by using an assurance case. As a result, this study will: 1) Clarify the range of agreement and disagreement between the two companies' information security policies; and 2) show how two companies mutually conclude a final agreement for the entire range using the assurance case created. We also present the quantitatively evaluated results from Goal Structuring Notation (GSN) users' ability to structuralize systems with multiple viewpoints by using GSN. This evaluates the proposed description method. We asked three experts in information security to evaluate the understanding, utility and effectiveness of the proposed assurance case description method. The study participants used the method to create an assurance case.

In recent years, there are many studies related to coaching in business. The previous study stated that the relationship between the client and the coach in coaching is premised on being equal, not hierarchical. The previous study states that the coaching performed between superiors and subordinates is highly likely that the prerequisites have not been met. The difficulty of coaching with the coach and the client has become apparent because they feel being controlled by communication techniques. The purpose of this research is to clarify problems about self-coaching methods that improve self-talk on their own in order to solve on their own rather than between the coach and the client. We investigated what previous studies have been conducted on the coaching methods to improve self-talk. Concretely, we have created a matrix with three axes (Self-talk, self-coaching and coaching method or not) to organize previous studies. As a result of analysis, there are two problems found from this research. One is that the self-coaching methods in the previous study do not show the reason why self-talk is caused and how to improve self-talk. The other is that they cannot show how to change self-talk. Finally, this research concludes future research topics.

Previous studies showed that using assurance cases to increase the feasibility of accomplishing management vision and management strategy. The assurance case description method proposed by previous studies, however, does not take into account the work whose purpose changes in the progress. This study proposes an assurance case description method according to the PROCESS definition defined in this study, for being able to visualize that assuring a task whose purpose changes according to the work progress. The reason we refer to ISO 15288:2015 is that PROCESS defined in ISO 15288:2015 considers Purpose, and thus assumes changes in a certain work's purpose in the progress of the work. This study evaluates the effectiveness of both a) being able to understand the purpose of PROCESS and b) being able to visualize that assuring a work whose purpose changes according to the work progress by using both open coding and paired t-test. Based on the paired t-test result, the proposed description method was judged effective compared with current practice, about a) being able to understand the purpose of PROCESS and b) being able to visualize that assuring a work whose purpose changes according to the work progress. Furthermore, from the open coding results, the results suggested why the proposed description method is effective. This study concludes with future research topics.

This study aims to shorten the time to reach consensus and increase the success probability of the consensus-building process itself to facilitate decision-making by multiple stakeholders. Further, we create a tool to identify the stakeholders, their power of influence, and product evaluation to explain the product based on stakeholder requirements, while salespeople outside the organization work together with the mobilizer (the stakeholder who brings together the decision-makers) to promote the product inside the organization. We propose a method to strategically judge the approach's efficiency to address the stakeholders using the tool. In particular, we propose the stakeholder map to quantify and complement "product evaluation" and "interviewer's influence." Further, we clarify the effectiveness, efficiency, intelligibility, and operability of the rating scale and the open coding by utilizing the comments of mobilizers regarding the evaluation method. Finally, we conclude that this method promotes consensus building.