Model Pemilihan Supplier Material Konstruksi Berkelanjutan Berbasis Analisis Jejak Karbon: Studi Kasus Gedung Creative Center ITS

Sakkung, Felicia Gabriela (2026) Model Pemilihan Supplier Material Konstruksi Berkelanjutan Berbasis Analisis Jejak Karbon: Studi Kasus Gedung Creative Center ITS. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam memilih pemasok bahan bangunan, fokus utama seringkali masih pada harga, sementara faktor lingkungan jarang menjadi pertimbangan utama dalam pengambilan keputusan. Studi ini berupaya menggabungkan Building Information Modelling (BIM) dengan analisis jejak karbon untuk menyeleksi pemasok material struktur di Gedung STP Creative Center ITS, sebuah proyek yang mengusung konsep bangunan hijau. Proses pemodelan dilakukan secara bertahap, diawali dengan BIM 3D untuk mendapatkan data Quantity Take-Off (QTO), kemudian dikembangkan menjadi BIM 4D untuk menyusun jadwal pekerjaan. Perkiraan biaya material menggunakan fitur shared parameters pada BIM 5D di Autodesk Revit, sehingga harga satuan setiap material langsung terhubung dengan kuantitas hasil QTO dalam jadwal model. Perhitungan embodied carbon dilaksanakan melalui BIM 6D dengan memanfaatkan plug-in Carbo Life Calculator. Faktor emisi untuk baja dan beton merujuk pada Inventory of Carbon and Energy (ICE) Database dari University of Bath, sedangkan material tulangan dihitung dari perkalian hasil QTO dengan faktor emisinya. Total embodied carbon bangunan mencapai 780.609 kgCO2e, dengan kontribusi terbesar dari baja (51%), diikuti beton (26%), dan tulangan (23%). Selanjutnya, pemilihan pemasok dilakukan menggunakan metode Analytical Hierarchy Process (AHP) dengan tiga kriteria: biaya, waktu pengiriman, dan emisi karbon transportasi. Masing-masing kriteria mendapatkan bobot 0,63, 0,11, dan 0,26, dengan rasio konsistensi 0,033. Bhirawa Steel dipilih untuk material tulangan, Supplier L untuk baja, dan Adhimix RMC untuk beton. Total biaya pengadaan adalah Rp4.512.968.931 dengan emisi karbon transportasi 10.404,59 kgCO2. Jika dibandingkan dengan skenario terendah dari segi biaya, kombinasi ini hanya menambah biaya sekitar 0,158%, namun berhasil mengurangi emisi karbon transportasi sebesar 103,19 kgCO2 dan mempersingkat waktu pengiriman selama 25 menit. Temuan ini memperkuat bahwa pertimbangan biaya dan keberlanjutan dapat berjalan selaras apabila didukung oleh integrasi BIM dan analisis multikriteria sejak tahap perencanaan awal.
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Though environmental elements are seldom taken into account in decision-making, the main focus in choosing building material providers is still often on price. To choose structural material suppliers for the STP Creative Center Building at ITS, a project built around the green building concept, this study integrates Building Information Modelling (BIM) with carbon footprint analysis. Starting with 3D BIM to gather Quantity Take-Off (QTO) data, modelling was done stage by stage into 4D BIM for work planning. Material cost estimation used the shared parameters tool in 5D BIM in Autodesk Revit to directly link every material's unit price to the QTO volumes in the model schedule. Embodied carbon was determined using the Carbo Life Calculator plug-in through 6D BIM. Steel and concrete's emission factors came from the University of Bath's Inventory of Carbon and Energy (ICE) Database; reinforcement was computed by multiplying QTO values by its emission factor. With steel contributing the most (51%), then concrete (26%), then reinforcement (23%), the whole embodied carbon of the building came to 780,609 kgCO2e. Supplier selection then used the Analytical Hierarchy Process (AHP) method with three criteria—cost, delivery time, and transportation carbon emissions—weighted 0.63, 0.11, and 0.26 respectively, with a consistency ratio of 0.033. Bhirawa Steel was chosen for reinforcement, Supplier L for steel, and Adhimix RMC for concrete, resulting in a total procurement cost of IDR 4,512,968,931 and transportation carbon emissions of 10,404.59 kgCO2. This combination increased cost by only around 0.158% as opposed to the cheapest case, while cutting delivery time by 25 minutes and carbon emissions by 103.19 kgCO2. Early design stage integration of BIM and multi-criteria analysis helps cost and environmental concerns coincide.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	AHP, BIM, Carbon Footprint, Embodied Carbon, Supplier Material, AHP, BIM, Carbon Footprint, Embodied Carbon, Supplier Material
Subjects:	T Technology > TH Building construction > TH438.13 Building information modeling. T Technology > TH Building construction > TH880 Sustainable buildings. Sustainable construction. Green building
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Felicia Gabriela Sakkung
Date Deposited:	28 Jul 2026 08:04
Last Modified:	28 Jul 2026 08:04
URI:	http://repository.its.ac.id/id/eprint/138947

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