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All Journal Tibuana : Journal of Applied Industrial Engineering JISO : Journal of Industrial and Systems Optimization Metta : Jurnal Ilmu Multidisiplin Indonesian Journal of Innovation Multidisipliner Research Jurnal Cakrawala Maritim
Maharani, Aditya
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Identification Of Risk Events And Risk Agents In Goods Hoarding At The Port Using Fishbone Diagram Maharani, Aditya; Rabbani, Latof Syeikhur
Tibuana Vol 3 No 01 (2020): Tibuana Vol.3 No.1 Tahun 2020
Publisher : UNIPA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/tibuana.3.01.2197.24-29

Abstract

X is a loading and unloading company (Perusahaan BongkarMuat/ PBM) which operates in the Port of Tanjung Perak, Surabaya. In 2018, the PBM experienced a hoarding of 65,698 tons of wirerod so the company had to issue a hoarding rate of Rp. 147,820,500. The fishbone diagram method is used to look for risk events and risk agents. From three main problems of goods hoarding, it is obtained the results of identification of risk events and risk agents, there are 17 risk events and 30 risk agents identified as triggers for the hoarding of goods at the port.
Bidding Models Analysis on Ship Repair Projects (Friedman and Ackoff & Sasieni Models) Maharani, Aditya; Hardiyati, Fitri; Subagyo, Ali
Tibuana Vol 4 No 02 (2021): Tibuana
Publisher : UNIPA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/tibuana.4.02.4011.104-109

Abstract

The existence of a ship project carried out with a tender system by the LPSE allows all shipyard industries to bid on the project, this causes the chances of winning to become smaller, the determination of the tender price greatly determines the size of the profit that can be obtained and the percentage of the possibility of winning the project in a shipping industry. Therefore, the strategy of determining the bid price is very important. The statistical method used is multi discrete distribution, and multi normal distribution, while the bidding model uses Friedman (1956) and Ackoff & Sasieni (1968) models. The results obtained the best bid price strategy to win an auction or tender is the model that produces the lowest optimum mark-up, namely the Friedman model with multi normal distribution, while for Ackoff & Sasieni it produces a higher bid than the Friedman model except in certain company conditions.
Human Factors Analysis and Classification System (HFACS) on Accidents Due to Tilting Ship Kurniasih, Dewi; Maharani, Aditya; Ashari, Mochamad Luqman
Indonesian Journal of Innovation Multidisipliner Research Vol. 2 No. 2 (2024): June
Publisher : Institute of Advanced Knowledge and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69693/ijim.v2i2.134

Abstract

The transportation industry is the main point of the distribution of goods and passengers. Data shows the number of shipwrecks is very high. The accident was caused by many factors, one of which was the tilting of the ship. The research starts from categorizing the causes of ship accidents through existing secondary data, FGD with expert judgments to find the root of the problem and also looking for what mitigations can be done so that similar incidents do not repeat. And the analysis is made in the Human Factors Analysis and Classification System (HFACS) method. The results of this study indicate that there are human factors in recurring events at all stages of HFACS such asunsafe acts, the preconditions for unsafe acts, unsafe supervision and organisational influences. For the stages of unsafe acts are Skill based Errors, decision errors, Perceptual Errors, and Exceptional. For the stage of the preconditions for unsafe acts are technological environment, physical environment, and adverse mental state; and for the stage of unsafe supervision is the lack of supervision; for organizational influences there are resource management and organizational climate.
SCHEDULING EVALUATION OF CONSTRUCTION PROJECT USING FUZZY LOGIC APPLICATION FOR SCHEDULING (FLASH) METHOD Hasugian, Devina Bianca Putri Rahadyan; Maharani, Aditya; Rachman, Farizi
JISO : Journal of Industrial and Systems Optimization Vol. 7 No. 1 (2024): Juni 2024
Publisher : Universitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/jiso.v7i1.31-38

Abstract

For the running of a project, it is necessity to have project planning such as project schedule. PT Ometraco Arya Samanta is a company that engaged in steel structure. This company implement schedule planning based on tonnage. This method is considered suboptimal, since in its implementation has discrepancy of completion time between the schedule plan and the actual. To get an optimal schedule, it needs appropriate method. Construction project is a complex project and has uncertainty completion time. Project Evaluation and Review Technique (PERT) and Fuzzy Logic Application for Scheduling (FLASH) could be used for projects with uncertain completion time and more emphasis on time estimation than cost. PERT and FLASH are using three estimation time, then obtained probability percentage of completion time. Nevertheless, PERT is only consider the completion time by the critical path, while FLASH is able to determine project time by the entire project activities. Thereby, the methods used in this article is FLASH. The analysis results of this case study as follows: the interval completion time with FLASH in the amount of 106 days for optimistic time, 237 days for pessimistic time, and 169 days for most likely time. By the duration target of 179 days, it is obtained 85,29%. Dalam pengerjaan suatu proyek diperlukan perencanaan proyek berupa penjadwalan proyek. PT Ometraco Arya Samanta merupakan perusahaan konstruksi baja. Perusahaan ini memanfaatkan penjadwalan berdasarkan tonase proyek. Metode tersebut dirasa belum optimal, sebab dalam pelaksanaannya sering kali terjadi ketidaksesuaian waktu penyelesaian proyek antara rencana dengan aktualnya. Untuk mendapatkan penjadwalan yang optimal, diperlukan metode yang tepat. Proyek konstruksi merupakan proyek yang kompleks dan memiliki durasi penyelesaian yang bersifat tidak pasti. Project Evaluation and Review Technique (PERT) dan Fuzzy Logic Application for Scheduling (FLASH) dapat digunakan untuk proyek yang memiliki ketidakpastian waktu dan menekankan pada estimasi waktu daripada biaya. PERT dan FLASH menggunakan tiga estimasi waktu yang kemudian didapatkan persentase kemungkinan terselesaikannya proyek. Namun, PERT hanya memperhitungkan waktu penyelesaian proyek berdasarkan lintasan kritis, sedangkan FLASH dapat mempertimbangkan waktu proyek dari keseluruhan kegiatan proyek. Sehingga, metode yang digunakan di dalam artikel ini adalah FLASH. Hasil analisis dari penelitian ini didapatkan selang waktu penyelesaian proyek yaitu waktu paling cepat 106 hari, waktu paling lama 237 hari, dan waktu paling mungkin sebesar 169 hari. Dengan menggunakan waktu target 179 hari, didapatkan probabilitas sebesar 85,29% dari rentang waktu 169 hari hingga 237 hari.
SOSIALISASI MENGENAI ERGONOMI TERHADAP POSTUR KARYAWAN DAN PENGUKURAN LINGKUNGAN KERJA KONVEKSI SIMPATI, SIDOARJO Maharani, Aditya; Rizal, Mochammad Choirul; Kurniasih, Dewi; Cahyaningati, Desi; Ashari, Mochamad; Mahfudzi, Imam
Jurnal Cakrawala Maritim Vol. 8 No. 2 (2025): Jurnal Cakrawala Maritim
Publisher : P3M Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35991/jcm.v8i2.42

Abstract

Konveksi mempunyai peranan penting dalam mendukung tercukupinya kebutuhan sandang manusia. Akan tetapi, proses kerja di industri konveksi memiliki risiko keselamatan dan kesehatan terhadap pekerja. Hal ini berkaitan dengan aspek lingkungan kerja dan ergonomi. Aspek tersebut kadang diabaikan oleh beberapa pemilik perusahaan. Hasil survei menunjukkan bahwa Konveksi SIMPATI belum sepenuhnya menerapkan aspek tersebut dalam pekerjaannya. Dilakukannya pengabdian masyarakat ini bertujuan untuk memberikan edukasi dan pemahaman yang relevan terkait postur kerja dan aspek ergonomi lainnya. Selain itu juga dilakukan pengukuran terkait lingkungan kerja bertujuan untuk rekomendasi diterapkan pada area kerja Konveksi SIMPATI. Dengan adanya kegiatan ini dapat meningkatkan pengetahuan pekerja mengenai beberapa faktor bahaya ergonomi serta mencegah adanya gangguan penyakit akibat kerja berdasarkan hasil pengukuran lingkungan kerja dari faktor pencahayaan dan kebisingan.
Pengujian Tripotassium Sitrat dan Asam Sitrat Sebagai Fire Retardant Pada Kain Gorden Kurniasih, Dewi; Ashari, Moch. Luqman; Maharani, Aditya; Santoso, Mardi; Cahyaningati, Desi; Rizal, Mochammad Choirul
Metta : Jurnal Ilmu Multidisiplin Vol. 5 No. 2 (2025)
Publisher : Jayapangus Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37329/metta.v5i2.3927

Abstract

Based on data from the Indonesian Police and Fire Department, the number of fire incidents is quite high and the most frequent fires are residential buildings. Therefore, it is necessary to conduct research related to materials that can inhibit the spread of fire. This research was conducted with the intention of determining the ability of Tripotassium Citrate in sweet potato skin and Citric Acid in inhibiting the spread of fire. The purpose of this study was to determine which material is more effective by testing and combining the dosage of each material. The method used was to conduct an experimental test on the combination of these materials in inhibiting the spread of fire. The aspects measured in this study were the mass loss and the area burned from each sample. The experimental results show that Tripotassium citrate has a function in slowing down the fire ignition stage with a mass loss ranging from 0.67 - 0.97 grams and a percentage of burned area ranging from 17.54% - 23.85%. While citric acid has a function in slowing down the fire growth stage with a mass loss ranging from 0.01 - 0.17 grams and a percentage of burned area ranging from 1.75% - 7.08%. The combination of the two materials produced results with a mass loss ranging from 0.2 - 0.8 grams and a percentage of burned area ranging from 4.27% - 14.04%. With these results, it can be concluded that Tripotassium Citrate and Citric Acid can be used as fire retardants.
Co-Authors Ashari, Moch. Luqman Cahyaningati, Desi Dewi Kurniasih Farizi Rachman Hardiyati, Fitri Hasugian, Devina Bianca Putri Rahadyan Mahfudzi, Imam Mardi Santoso Mochamad Ashari Mochamad Luqman Ashari Mochammad Choirul Rizal Rabbani, Latof Syeikhur Subagyo, Ali