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All Journal Bulletin of Civil Engineering Journal of Infrastructure Policy and Management (JIPM)
Zolkafli @Zulkifly, Umi Kalsum
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering

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Exploring Delphi Method Utilization Research Trends on Public-Private Partnership Infrastructure Studies Sunandar, Ali; Abd Karim, Saipol Bari; Zolkafli @Zulkifly, Umi Kalsum
Journal of Infrastructure Policy and Management (JIPM) Vol. 8 No. 1 (2025): Journal of Infrastructure Policy and Management (JIPM)
Publisher : PT Penjaminan Infrastruktur Indonesia (Persero)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35166/jipm.v8i1.92

Abstract

This study seeks to explore the application of the Delphi method in Public-Private Partnership (PPP) infrastructure research over a ten-year span (2015-2024), with a focus on various characteristics such as the application of the Delphi method across different PPP infrastructure sectors, expert criteria for Delphi panels, the diverse use of consensus, and the execution of Delphi rounds. Employing a Systematic Literature Review (SLR) guided by the PRISMA framework, the study utilizes thematic categories alongside co-occurrence and co-authorship analyses to identify trends in the application of the Delphi method in PPP infrastructure studies. The review concentrates on literature indexed in two leading academic databases: Web of Science (WoS) and Scopus. The findings indicate that the use of the Delphi method has grown significantly in the past ten years within infrastructure PPP schemes, particularly in emerging countries driven by the increasing demand for infrastructure development. Research trends have highlighted a variety of characteristics of the Delphi method, including criteria for selecting experts, the number of expert participants, the number of Delphi rounds, and different approaches for achieving consensus or agreement. These findings offer valuable insights to inform and enhance the methodological rigor of future research utilizing the Delphi method in the context of PPP infrastructure.
Fuzzy AHP Method Utilization in Public-Private Partnership Infrastructure Research: A Review Sunandar, Ali; Andriyanti, Fitri; Abd Karim, Saipol Bari; Zolkafli @Zulkifly, Umi Kalsum
Bulletin of Civil Engineering Vol. 6 No. 2 (2026): Agustus (Progress)
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/bce.v6i2.31705

Abstract

This study aims to  to review the utilization of the Fuzzy AHP method in PPP infrastructure research. A qualitative research design was adopted, employing a systematic literature review of articles indexed in Scopus and Web of Science and published between 2016 and 2025. The selected studies were examined using thematic analysis. The findings indicate that Fuzzy AHP is primarily applied in four major areas: risk assessment, partner and investment selection, sustainability and performance evaluation, and methodological development. The results also demonstrate a growing application of Fuzzy AHP in hybrid decision models that integrate complementary multi-criteria techniques and advanced fuzzy approaches. These developments reflect a methodological transition from standalone applications toward more integrated analytical frameworks. The novelty of this study lies in its comprehensive knowledge review of Fuzzy AHP applications within the PPP infrastructure domain and the development of a synthesized conceptual framework. The study contributes to the literature by clarifying research trajectories, identifying dominant thematic areas, and highlighting methodological evolution. The main limitations relate to the restricted database coverage and the specified time frame. Future research should conduct comparative studies with other decision-making methods to further examine methodological advancements in PPP research.
Co-Authors Abd Karim, Saipol Bari Ali Sunandar Andriyanti, Fitri