1. Research Professor, Agency for Research and Development Ministry of Public Works and Housing, Jalan Panyawungan Cileunyi Wetan, Kabupaten Bandung 40393, Indonesia (corresponding author). ORCID: .
2. University Professor and Chair of Construction Engineering and Management, Dept. of Civil Engineering, Technical Univ. of Berlin, Gustav-Meyer-Allee, Berlin 13355, Germany.