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All Journal Teknik Sipil dan Arsitektur Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik JITEK (Jurnal Ilmiah Teknosains) Teras Jurnal Owner : Riset dan Jurnal Akuntansi Jurnal Arsitektur ZONASI Jurnal Teknik Sipil dan Arsitektur Jurnal Program Kemitraan dan Pengabdian Kepada Masyarakat Media Komunikasi Dunia Ilmu Sipil (MoDuluS) Jurnal Pengabdian Masyarakat Madani Jurnal Teknik Sipil Giratory Upgris Journal of Economic, Business and Engineering (JEBE) Jurnal Kreativitas dan Inovasi (Jurnal Kreanova) International Journal of Sustainable Building, Infrastructure and Environment
Agung Kristiawan
Program Studi Teknik Sipil, Fakultas Teknik, Universitas PGRI Semarang
Religion Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Mechanical Engineering Social Sciences Transportation Veterinary Other

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Six Sigma-DMAIC (Define, Measure, Analyze, Improve, And Control) Analysis in Reducing Building Structural Defects (Case Study: Emirates Indonesia Cardiology Hospital Project) Mustika, Risti; Suwandi, Putri Anggi Permata; Kristiawan, Agung
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 2 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i2.24619

Abstract

Abstract. Construction projects often face challenges in maintaining quality, one of which is structural defects that can affect the quality and safety of the building. This study aims to analyze the level of defects in column, beam, and slab structures using the Six Sigma DMAIC method and provide solutions to improve these defects. The study was conducted on the Emirates Indonesia Cardiology Hospital Building Construction Project in Surakarta. The method used is a quantitative descriptive approach with the stages of Define, Measure, Analyze, Improve, and Control. Data were obtained through field observations, interviews, documentation, and secondary project data. The analysis results show that the average sigma level value is above 3, with the highest level in the column structure reaching 4.3 sigma for the type of concrete flow defect. The main causes of defects come from human factors, work methods, materials, and supervision. Improvement solutions are formulated using a fishbone diagram analysis approach and the assistance of NVIVO software for qualitative data analysis. This study shows that the Six Sigma DMAIC method is effective in identifying and reducing defects in concrete structure work and can be used as a quality control strategy in construction projects.Keywords: Six Sigma, DMAIC, Structural Defects, Construction Quality, NVIVO
Analysis of The Effect of Change Orders on Implementation Time and Construction Labor Costs in The Development Project of The Joint Lecture Building III at Unimus Rinaldi, Bramantyo; Suwandi, Putri Anggi Permata; Kristiawan, Agung
International Journal of Sustainable Building, Infrastructure and Environment (IJOSBIE) Vol 6, No 1 (2025)
Publisher : Science and Technology Research Centre, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/ijosbie.v6i1.21537

Abstract

Change orders resulted in a total time deviation of 45 days (18.75%) from the initial plan, with the most substantial delays in structural and MEP work. Regarding labor costs, MEP work experienced the largest deviation at 25% (IDR 150,000,000), followed by foundation work (16.67%), structural work (15%), and architectural work (10%). Change orders also impacted labor productivity, particularly in MEP work (-25%), followed by foundation (-16%), structural (-12.5%), and architectural work (-12.5%). These productivity decreases resulted from changes in work methods, increased complexity, and adaptation requirements to new specifications. The study recommends several measures to minimize change order impacts: more thorough design reviews before implementation, allocation of time and cost buffers, improved documentation and approval systems, and more flexible workforce planning. Effective change order management is crucial for maintaining overall project success.
Co-Authors Abidin, Ali Nur Afifah, Risdiana Cholifatul Agustina Wardani Alfafa, Jannah Rahmah Anggi P. S., Putri Arif, An Zaenal Astiyani, Heni Azzahra, Synsya Ealiah Baju Arie Wibawa, Baju Arie Carsoni Deden Prasetyo Endah Sulistyowati Enggartiasto, Lintang Fauzi, Dwi Achmad Hermanto, Wilarso Himawan, Erry Ibnu Toto Husodo, Ibnu Toto Iffah Qonitah Ikhwanudin Ikhwanudin Irawan, Arie Kris Kamal, Sukron Kurnia Widiastuti LARASATI, ENDAH Mega Arisia Dewi Mildawati, Titik Mustika, Risti Najifati Sekar Pujaningtyas Ninditas, Velma Nur Aksin, Nur Panolas, Yoga Bagus Prandika, Nofvim Eric Putri Anggi Permata Suwandi Putri Anggi Permata Suwandi, Putri Anggi Qonitah, Iffah Ramadhani, Vicha Silviana Ratna Nugraheni Ratri Septina Saraswati, Ratri Septina Rinaldi, Bramantyo Rosiyani, Tissa Rahayu Rusyadi, Imron Samsudin, Nur sandra, Susandra Saputro, Bayu Singgih Setyawardani , Lydia Setyawardani, Lydia SHOLIKIN, YUDHA ALFANDA MUHAMMAD Slamet Budirahardjo Slamet Supriyadi Subagjo, Irma Suep, Muhamad Supriyono, Joko Suwandi, Putri Anggi Permata Triwidodo, Puput Viantoro, Trinugroho Ardin Widjaja, Pele WISNU SAPUTRA