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All Journal Jurnal SImetri Rekayasa
Alfi Dwanda Putra Mulia
Universitas Harapan Medan
Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Penyebab Repulping Dengan Metode Failure Mode And Effect Analysis (FMEA) Dan Fault Tree (FTA) Pada Departemen Fiberline Di PT. Toba Pulp Lestari, TBK Zaharuddin Zaharuddin; Denny Walady Utama; Uun Novalia Harahap; Rahmat Wahyu; Alfi Dwanda Putra Mulia
Jurnal Simetri Rekayasa Vol 4 No 1 (2022): Edisi April 2022
Publisher : Universitas Harapan Medan

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PT. Toba Pulp Lestari, Tbk is a company engaged in the pulp and kerta production business with domestic and foreign product marketing areas. PT. Toba Pulp Lestari, Tbk is one of Indonesia's largest pulp and paper producing companies. The purpose of this study is to determine the ability of the process based on existing off-grade products using the Failure Mode and Effect Analysis and Fault Tree Analysis methods to then control and analyze the causes of off-grade products and seek improvements. The results showed that there were 3 types of off-grade products: Low Brightness, Dirt Count, and Viscosity. From the calculation, the results were obtained that the largest off-grade products were X1 (viscosity) with a number of smallpox products as much as 167 tons with 26.95%, X2 (brightness) with a number of defective products with as much as 332 tons with 53.55%, and X3 (dirt count) with the number of defective products as much as 124 tons with 20%. From the FMEA results, the highest Risk Priority Number (RPN) value was obtained, namely 432 for the cause of failure due to irregular setting of the temperature and time of the digester and washing machine at Low Brightness failure. For continuous improvement, various aspects are carried out, namely human aspects, work environment, work methods, machines, and, materials.
Pengendalian Persediaan Sparepart Sepeda Motor dengan Menggunakan Material Requirement Planning di CV. Parna Jaya Motor Indrapura Zaharuddin Zaharuddin; Abdul Azis Syarif; Denny Walady Utama; Dimas Pramana Putra; Alfi Dwanda Putra Mulia
Jurnal Simetri Rekayasa Vol 4 No 1 (2022): Edisi April 2022
Publisher : Universitas Harapan Medan

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Inventory control is a company policy related to investment and service to consumers. CV. Parna Jaya Motor is a company engaged in the sale and repair of motorcycles. The problems that occur in this company are related to inventory controlspare partsthat causes consumer demand to bespare partsnot fulfilled. To overcome this, the company must be able to control inventoryspare partsso that consumer demand is fulfilled by applying the ABC Analysis method, then calculating the MRP to find out the number of orders (EOQ), order frequency (SS) and when to place an order again (ROP). The results of data processing using the method above obtained results for the ABC classification of 45 speciesspare parts,gotspare partsbelonging to class A consists of 13 speciesspare partswith an investment value of IDR 807,455,000 or 68% of the total investment, class B consists of 12 typesspare partswith an investment value of IDR 250,323,000 or 21% of the total investment and class C consisting of 20 typesspare partswith an investment value of IDR 127,266,000 or 11% of the total investment. Of 13 typesspare partsclass A which is a priority, EOQ results range from 28-293 units, F results range from 7-13 times/year, SS results range from 23-82 units, ROP results range from 95-303 units, and TC results everyspare partsranges from IDR 595,500 – IDR 1,075,200 with all TCspare partsRp. 10,101,900.
Co-Authors Denny Walady Utama Dimas Pramana Putra Rahmat Wahyu Uun Novalia Harahap Zaharuddin Zaharuddin