Putri Novia   Madiun State Polytechnic, Indonesia,
Bi Asngali   Madiun State Polytechnic, Indonesia,
Agus Susanto   Madiun State Polytechnic, Indonesia,
Riant Adzandy   PT. Industri Kereta Api (Persero), Indonesia,
Hedi Purnomo   PT. Industri Kereta Api (Persero), Indonesia

Fajar Perdana Nurrullah   Department of Mechanical Engineering Institut Teknologi Sumatera, Indonesia,
Fajar Paundra   Department of Mechanical Engineering Institut Teknologi Sumatera, Indonesia,
Anas Maulana   Department of Mechanical Engineering Institut Teknologi Sumatera, Indonesia,
Abdul Muhyi   Department of Mechanical Engineering Institut Teknologi Sumatera, Indonesia,
Akhmad Nurdin   Manufacturing Design Engineering Technology Politeknik Manufaktur Ceper, Indonesia,
Indriyani Indriyani   Departement of Mechanical Engineering Universitas Sang Bumi Ruwa Jurai, Indonesia

Kurnia Dwi Artika   Program Studi Teknologi Otomotif Politeknik Negeri Tanah Laut, Indonesia,
Suhardjono Suhardjono   Fakultas Teknik Industri, Jurusan Teknik Mesin Institut Teknologi Sepuluh Nopember Surabaya, Indonesia,
Yuliana Ningsih   Program Studi Teknologi Otomotif Politeknik Negeri Tanah Laut, Indonesia

Sudirman Rizki Ariyanto   Faculty of Engineering, Department of Mechanical Engineering Universitas Negeri Malang, Indonesia,
Retno Wulandari   Faculty of Engineering, Department of Mechanical Engineering Universitas Negeri Malang, Indonesia,
Suprayitno Suprayitno   Faculty of Engineering, Department of Mechanical Engineering Universitas Negeri Malang, Indonesia,
Muhammad Yandi Pratama   Faculty of Engineering, Department of Mechanical Engineering Universitas Negeri Malang, Indonesia,
Ata Syifa’ Nugraha   Faculty of Engineering, Department of Mechanical Engineering Universitas Billfath, Indonesia

Nikolas Krisma Hadi Fernandez   Department of Mechanical Engineering, Faculty of Engineering and Technology Sampoerna University Department of Mechanical Engineering, Faculty of Mechanical Engineering and Manufacturing Universiti Tun Hussein Onn Malaysia, Indonesia,
Farid Triawan   Department of Mechanical Engineering, Faculty of Engineering and Technology Sampoerna University, Indonesia