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Journal : OPSI

Redesign Road Project Using Critical Chain Project Management Method and Crashing Method Arif Budi Sulistyo; Ilpan Ilpan; Afni Khadijah
OPSI Vol 14, No 2 (2021): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v14i2.5651

Abstract

Construction of the Provincial road project from Parigi to Sukamanah is carried out by PT. Jaya Madiri Konsulindo as consultant and PT. Karya Tunas Mandiri Persada as contractor. The problem of the construction project is implementation duration does not match to previous planning which results delay in completion time. It is necessary to re-plan the project in order to get either optimal time or cost. The purpose of this research is to find out the critical work path using critical chain project managemet method by utilizing microsoft project software and optimization of project time and cost using crashing method with alterative increase of working hours (overtime) and addition of labor. The research’ scope is limited on labor cost only. Based on the results of the study obtained that initial labor wage cost is IDR 585,025,000.00 with a working duration of 154 days, and results of the alterative crashing  method is lower with labor wage cost IDR 576,750,000.00. It could save cost about IDR 8,275,000.00 with duration of work 150 days or earlier 4 days from the initial duration.
Improving implementation of occupational health and safety of construction company by Job Safety Analysis (JSA) method (study case at PT Arto Moro Sentosa) Sulistyo, Arif Budi; Putra, Nugroho Pratama; Wijaya, Hartadi; Hidayanti, Nur
OPSI Vol 17, No 1 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i1.11005

Abstract

The construction sector is a sector that employs many people who have high risk of work accidents, because a lot of work in this sector is possibility carried out by unsafe actions or unsafe conditions. PT. Arto Moro Sentosa is company which operates in general trading, general construction, suppliers, outsourcing, etc., is aware that the business has a high risk of work accidents. The lack of employee awareness will have an impact on the magnitude of the risks that must be borne by the worker and the company. The purpose of this research is determining work accident records for the Occupational Health and Safety (OHS) system, employee risks, and existing improvements at company. By knowing the classification of hazards based on the type of accident, this research uses the Job Safety Analysis (JSA) method, histograms, Pareto diagrams, and cause-and-effect (fish bone) diagrams. Based on the author's observations, company data related to OHS (Occupational Health and Safety) and interviews with the directors, could be obtained a history of work accidents based on the type of accident. Here are ergonomic work accidents (57.89%), physical factor accidents ( 31.58%), chemical factor accidents (5.26%), biological factor accidents (5.26%), and psychological factor accidents (0%). Several recommendation is performed to avoid repeated accident by providing training programs on OHS to workers, paying more attention to OHS supervision, giving sanctions to workers who violate OHS.