Studi Percepatan Durasi Pengerjaan Proyek Pembangunan Kapal Niaga Di PT. PAL Indonesia

Amirulloh, Reza Hervindra (2017) Studi Percepatan Durasi Pengerjaan Proyek Pembangunan Kapal Niaga Di PT. PAL Indonesia. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Percepatan total durasi dalam suatu proyek kontruksi dilakukan dengan mem-percepat kegiatan-kegiatan kritis dalam proyek tersebut. Untuk mengetahui mana saja kegiatan kritis dari suatu proyek, maka digunakan teknik Critical Path Method; yaitu dengan menggambar Network Diagram dari proyek tersebut, selanjutnya menghitung Earliest Event Time (EET), Latest Event Time (LET), lalu Total Float tiap kegiatan sehingga dapat diketahui mana saja kegiatan kritis dari proyek tersebut. Saat ini PT. PAL Indonesia menginginkan percepatan total durasi pada salah satu proyek pembangunan kapalnya. Sedangkan analisa percepatan yang dikerjakan secara manual berpotensi terjadinya kesalahan perhitungan karena adanya ketidaktelitian, maupun karena kompleksnya perhitungan yang disebabkan banyaknya skenario percepatan yang harus diperhitungkan pada saat menentukan kegiatan kritis mana saja yang harus dipercepat dan kegiatan kritis mana saja yang tidak perlu dipercepat; sehingga biaya percepatan yang harus dikeluarkan tidaklah optimum. Maka dari itu, analisa dikerjakan dengan bantuan tool berbasis Linear Programming bernama Solver yang terdapat pada Microsoft Excel, karena optimasi percepatan proyek tersebut dapat diselesaikan dengan persamaan linear. Analisa dimulai dengan menentukan persamaan linear, kendala linear, perhitungan batas percepatan serta perhitungan biaya percepatan yang dibutuhkan agar Solver dapat menyelesaikan kasus percepatan tersebut secara linear dengan hasil biaya per¬cepatan yang paling minimum. Hasil dari running Solver menunjukkan bahwa PT. PAL dapat mempercepat proyek yang semula berdurasi 635 hari menjadi 470 hari dengan total biaya percepatan sebanyak Rp. 6.357.843.097,88 bila mempercepat kegiatan A (Fabrication Block Cargo Hold) sebanyak 31 hari, kegiatan B (SUB. Assembly Block Cargo Hold) sebanyak 30 hari, kegiatan C (Assembly Block Cargo Hold) sebanyak 27 hari, kegiatan E (Grand Assembly Block Cargo Hold) sebanyak 27 hari, kegiatan F (Erection Block Shifting Module Cargo Hold) sebanyak 12 hari, kegiatan K (Grand Assembly Block Engine Room) sebanyak 7 hari, kegiatan M (Fabrication Block After Part) sebanyak 7 hari, kegiatan N (SUB. Assembly Block After Part) sebanyak 19 hari, kegiatan O (Assembly Block After Part) seba¬nyak 10 hari, kegiatan Q (Grand Assembly Block After Part) sebanyak 13 hari, kegiatan W (Grand Assembly Block Fore Part) sebanyak 10 hari, kegiatan X (Erection Block Shifting Module Fore Part) sebanyak 6 hari, kegiatan AA (Assembly Block Accomodation) sebanyak 9 hari, dan kegiatan AD (Erection Block Launching Module Accomodation) sebanyak 9 hari.
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The acceleration of construction project can be done by speeding up critical activities in the project. Critical Path Method is then used to find out which activities are critical or not; first is by drawing network diagram of that project, then is counting Earliest Event Time (EET), Latest Event Time (LET), and Total Float of each activity in order to determine which are critical activities in the project and which are not. Currently, PT. Pal Indonesia really need to accelerate one of it’s projects. While doing the acceleration analysis with Crash Program are potentially lead to the non-optimum results due to the complex of the analysis hierarchy nor the human-error inaccuracy, because there is so many acceleration scenario to determine. Therefore, the analysis is done with Solver in Microsoft Excel which is based of Linear Programming, because the crash cost optimization can be completed with linear equations. The analysis begins with determining the linear equations, linear constraints, the limit of crash durations, and the crash cost of each activity; in order for Solver to solve the crash program linearly so the most minimum total crash cost can be achieved. The Solver results shows that PT. PAL can accelerate the project for a total crash cost of Rp. 6,357,843,097.88 accelaration in 31 days of actvity A (Fabrication Block Cargo Hold), 30 days of activity B (SUB. Assembly Block Cargo Hold), 27 days of activity C (Assembly Block Cargo Hold), 27 days of activity E (Grand Assembly Block Cargo Hold), 12 days of activity F (Erection Block Shifting Module Cargo Hold), 7 days of activity K (Grand Assembly Block Engine Room), 7 days of activity M (Fabrication Block After Part), 19 days of activity N (SUB. Assembly Block After Part), 10 days of activity O (Assembly Block After Part), 13 days of activity Q (Grand Assembly Block After Part), 10 days of activity W (Grand Assembly Block Fore Part), 6 days of activity X (Erection Block Shifting Module Fore Part), 9 days of activity AA (Assembly Block Accomodation), and 9 days of activity AD (Erection Block Launching Module Accomodation).

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	linear programming; optimasi; percepatan durasi; proyek; solver.
Subjects:	T Technology > T Technology (General) > T56.8 Project Management
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	- REZA HERVINDRA
Date Deposited:	13 Apr 2017 03:25
Last Modified:	27 Dec 2017 08:18
URI:	http://repository.its.ac.id/id/eprint/3430

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