ANALISIS VARIANCE PADA PENERAPAN LEAN CONSTRUCTION TERHADAP WAKTU PRODUKSI PROYEK EPC (STUDI KASUS: PROYEK RESTORASI TANGKI MOGAS PT XYZ)

SABITHA NUR INDRIANI, . (2025) ANALISIS VARIANCE PADA PENERAPAN LEAN CONSTRUCTION TERHADAP WAKTU PRODUKSI PROYEK EPC (STUDI KASUS: PROYEK RESTORASI TANGKI MOGAS PT XYZ). Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Proyek EPC (Engineering, Procurement, and Construction) memiliki karakteristik yang kompleks dan padat jadwal, sehingga keterlambatan menjadi salah satu tantangan utama dalam pencapaian target waktu produksi. Penelitian ini bertujuan untuk menganalisis schedule variance dan variance yang terjadi pada penerapan Lean Construction dalam proyek EPC, dengan studi kasus proyek restorasi Tangki Mogas milik PT XYZ. Variance dianalisis melalui dua pendekatan utama: perbandingan antara baseline dan actual start (schedule variance), serta identifikasi variance yang tercatat dalam constraint log selama periode pelaksanaan proyek. Metode penelitian menggunakan metode deskriptif kuantitatif dengan data primer proyek periode Juni – September 2024. Analisis dilakukan dengan mengukur schedule variance terhadap baseline serta identifikasi jalur kritis melalui pendekatan Critical Path Method (CPM) menggunakan Microsoft Project. Selain itu, validasi hasil dilakukan melalui metode expert judgement untuk memastikan ketepatan interpretasi variance dan pengaruhnya terhadap waktu produksi. Hasil menunjukkan bahwa dari total 137 aktivitas selama periode pengamatan, sebanyak 46 aktivitas mengalami keterlambatan, 45 aktivitas sesuai rencana, dan 46 aktivitas mengalami percepatan. Terdapat 33 aktivitas yang berada di jalur kritis dan terdapat variance yang berpotensi memengaruhi waktu produksi secara langsung. Variance dalam constraint log menunjukkan hambatan dominan berasal dari isu tenaga kerja, proses approval, keterlambatan suplai material, dan akses area kerja. Temuan ini menegaskan bahwa penerapan prinsip lean construction yang fokus pada eliminasi pemborosan waktu melalui identifikasi variance dapat meningkatkan efektivitas waktu pada proyek EPC Kata Kunci: Variance, Proyek EPC, Lean Construction, Waktu ***** EPC (Engineering, Procurement, and Construction) projects are characterized by high complexity and tight schedules, making delays one of the main challenges in achieving targeted production timelines. This study aims to analyze schedule variance and variance occurring during the implementation of Lean Construction in EPC projects, using a case study of the restoration project of a Mogas Tank owned by PT XYZ. The variance is analyzed through two main approaches: a comparison between baseline and actual start (schedule variance), and the identification of variance recorded in the constraint log during the project implementation period. The research employs a descriptive quantitative method using primary data in the form of project schedule reports from June to September 2024. Each activity is analyzed by measuring schedule variance against the baseline and identifying the critical path using the Critical Path Method (CPM) in Microsoft Project. In addition, expert judgement is conducted to validate the accuracy of variance interpretation and its impact on production timelines. The results show that out of a total of 137 activities during the observation period, 46 activities experienced delays, 45 activities were on schedule, and 46 activities were completed ahead of schedule. A total of 33 activities were found to be on the critical path and had variance that potentially impacted the project’s production time. The variance recorded in the constraint log indicates that the dominant obstacles originated from labor issues, approval processes, material delivery delays, and limited work area access. These findings affirm that applying lean construction principles, which focus on eliminating time-related waste by identifying variance, can improve time effectiveness in EPC projects. Keywords: Variance, EPC Project, Lean Construction, Time

Item Type:	Thesis (Sarjana)
Additional Information:	1). Anisah, M.T. ; 2). Anang Wirdianto, S.T., M.T.
Subjects:	Teknologi dan Ilmu Terapan > Teknik Sipil
Divisions:	FT > S1 Pendidikan Teknik Bangunan
Depositing User:	Users 29474 not found.
Date Deposited:	13 Aug 2025 04:35
Last Modified:	13 Aug 2025 04:35
URI:	http://repository.unj.ac.id/id/eprint/60103

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