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All Journal Proceedings Conference on Marine Engineering and its Application
Arumsari Nurvita
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Engineering Mechanical Engineering

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OPTIMASI RESCHEDULE PEMBANGUANAN KAPAL KELAS 1 KENAVIGASIAN (KN. BACAN) DI ORELA SHIPYARD DENGAN LINIER PROGRAMING Rosita Elen; Poernomo Heroe; Arumsari Nurvita
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.651

Abstract

In a shipyard, shipbuilding process is inseparable from scheduling determined by the company. Although in the course of time a project usually meet obstacles in the process resulting on delays in building process and ship delivery. Pert Method (Project Evaluation Review Technique) is used in a project to find the critical path on network diagram in order to make time configuration becomes more effective. Furthermore crashing method is used by adding work hours to lessen lateness and excessive project cost. Duration accelerating used on critical path track, then cost minimilization and also linear programming time optimization completed by simplex approach on solver. The results obtained from time-planning calculation using network planning with Project Evaluation Review Technique (PERT) is applicable for the company on time and cost because the normal time which is 924 days could be crashed for 11 days into 913 days, increasing the efficiency on time and costs, the normal cost is about Rp Rp. 1,747,940,000 and the costs after crashing about Rp. 3,387,463,353. Results from Simplex LP (Linear Programming) for post-crashing duration is the optimum time because there is no change on solution’s solver in which the time is constant. The cost minimalization generated by simplex LP is Rp 6,046,912 day from crashed works. For a total duration of 11 days the minimum cost incurredis Rp. 66,516,03.
PERENCANAAN PEMELIHARAAN DAN OPTIMASI BIAYA PERAWATAN PADA SISTEM UTILITY DENGAN METODE PREVENTIVE MAINTENANCE Zainal Arifin Muhammad; Haryono Edi; Arumsari Nurvita
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.710

Abstract

A company oil refinery based on condensate or petroleum using corrective maintenance type, one of them is in utility system. Corrective maintenance is less suitable with the course of production in a company it is continuous because the company can lose due to production stopped. Therefore, reliability analysis is performed using preventive maintenance method the scheduling check or inspection is used to prevent machinery or equipment from being damaged. Thus, the performance of the machine can run smoothly so that the production process is not disrupted and more efficient. Cost operational from 2011-2017 will be identified failure with FTA and FMEA. So that will get the value of reliability. Then performed the scheduling in accordance with the resulting MTTF value. Then the cost will be calculated to produce more efficient maintenance cost and the result more efficient cost is 30%.
Co-Authors Haryono Edi Poernomo Heroe Rosita Elen Zainal Arifin Muhammad