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All Journal Jurnal HPJI (Himpunan Pengembangan Jalan Indonesia) JURNAL SIMETRIK
Marantika, Giovianne Friensty
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Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering

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Penerapan Cost Significant Model untuk Estimasi Biaya Proyek Rehabilitasi Ruang Kelas Belajar Pada Sekolah Negeri di Provinsi Maluku Tahapary, Yesia; Marantika, Giovianne Friensty
JURNAL SIMETRIK Vol 16 No 1 (2026): Juni
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v16i1.3586

Abstract

This research examines the application of the Cost Significant Model (CSM) for estimating costs in classroom rehabilitation projects at public schools in Maluku Province. Given the region’s challenging geographical characteristics and the urgent need to improve educational infrastructure, accurate and efficient cost estimation methods are essential to prevent budget overruns and delays. The study collects and analyzes historical budget data from similar projects implemented between 2019 and 2024. By identifying the most significant cost items that contributed to the largest share to total expenses, the CSM allows for targeted resource allocation and effective risk mitigation. The research employs quantitative methods, including inflation adjustments and multiple regression analysis, to develop a predictive cost estimation model. Model accuracy is assessed using the Mean Absolute Percentage Error (MAPE), which shows a low average error of just 2.26%, confirming CSM’s effectiveness and consistency with previous studies. The findings demonstrate that CSM is both efficient and reliable for early-stage cost estimation in educational facility rehabilitation, especially when detailed project information is limited. The study recommends integrating CSM with conventional methods for optimal results as project data availability improves. Keywords: Construction Cost Estimation, Cost Significant Model, Project Management
STABILITAS DINDING PENAHAN TANAH RUAS JALAN WAISARISA SERAM BAGIAN BARAT Siahaya, Vera Theresia Caroline; Marantika, Giovianne Friensty; Lewakabessy, Godfried; Syahailatua, Elvira Cornelia
Jurnal HPJI (Himpunan Pengembangan Jalan Indonesia) Vol. 12 No. 1 (2026)
Publisher : Himpunan Pengembangan Jalan Indonesia (HPJI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/0w2ed648

Abstract

Abstract Stability of a structure is a crucial aspect in structural design, as it determines its safety against various loads. This study conducted observations in Waisarisa Village, West Seram Regency, Maluku Province. At the study site, there are two retaining walls, each 7 m high, at STA 06+00 - 06+15 and STA 08+00 - 08+05. The first site is in good condition, while the second site was damaged by landslides following heavy rainfall. This study was conducted to analyze the stability of the retaining wall to determine its safety level and to use the results as a consideration in improving conditions at the study site. Based on the analysis, a retaining wall design was developed to address the problems at the study site: a cantilever retaining wall with dimensions of 7 m high, 1 m footing height, 0.3 m top width, 4.6 m base width, 1.5 m toe width, and 2.4 m heel width. Keywords: stability of the structure; retaining wall; structural safety; cantilever wall Abstrak Stabilitas konstruksi merupakan aspek terpenting dalam perancangan suatu struktur, karena menentukan keamanan struktur tersebut terhadap berbagai beban. Pada studi ini dilakukan pengamatan di Desa Waisa­risa, Kabupaten Seram Bagian Barat, Provinsi Maluku. Di lokasi penelitian terdapat 2 titik dinding penahan tanah dengan tinggi 7 m, yaitu pada STA 06+00 - 06+15 dan STA 08+00 - 08+05. Kondisi titik pertama masih baik, sedangkan kondisi di titik kedua mengalami kerusakan akibat longsor setelah curah hujan yang tinggi. Studi ini dilakukan untuk menganalisis stabilitas dinding penahan tanah, agar dapat diketahui tingkat keamanannya serta hasilnya dapat digunakan sebagai bahan pertimbangan dalam memperbaiki kondisi yang terdapat di lokasi studi. Berdasarkan hasil analisis yang dilakukan, diperoleh desain dinding penahan tanah untuk menyelesaikan permasalahan di lokasi studi, yaitu dinding penahan tanah tipe kantilever dengan dimensi tinggi 7 m, tinggi tapak 1 m, lebar atas 0,3 m, lebar dasar 4,6 m, lebar kaki 1,5 m, dan lebar tumit 2,4 m. Kata-kata kunci: stabilitas konstruksi; dinding penahan tanah; keamanan struktur; dinding kantilever
Co-Authors Lewakabessy, Godfried Siahaya, Vera Theresia Caroline Syahailatua, Elvira Cornelia Tahapary, Yesia