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Optimalisasi Sistem Persediaan Bahan Baku Karet Mentah (Lateks) dengan Metode Lot Sizing (Studi Kasus: PT Abaisiat Raya) Rahmayanti, Dina; Fauzan, Ahmad
Jurnal Optimasi Sistem Industri Vol. 12 No. 1 (2013): Published in April 2013
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v12.n1.p317-325.2013

Abstract

PT Abaisiat Raya is one of the manufacturers of rubber crumb (crumb rubber) in the city of Padang. Latex inventory management system at PT Abaisiat Kingdom basically signinfikan still need improvement. It is based on the planning activities in the warehouse inventory of raw materials firms irregular, thus causing excess stock (over stock) at a time and shortage of stock (stock out) at other times. Process optimization is done with latex inventory system involving factors such as demand forecasting production planning or latex needs during the period of next 12 (in 2012), the costs involved, the waiting time (lead time), the implementation of forecasting methods, determination of size lots (lot sizing), the determination of safety stock (safety stock), and re-ordering time (reorder point), so the output will get a number of requests are for 12 periods ahead, the size of each reservation period, the total cost is required, when re-ordering will be done , as well as how much inventory to latex in the warehouse. Based on these results, it was found that the optimal size of the book is the same as the demand for each period (reservation is made each period) due to a cyclical pattern of demand and decreases throughout the planning period. Value of the stock or safety stock is located in Kg 114,282.20, and re-ordering time (reorder point) to cope with fluctuations do when the stock has reached a level of 333,130.95 kg.
Strategi Inovasi Industri Kecil Suku Cadang di Kota Padang Rahmayanti, Dina; Marcelena, Widya
Jurnal Optimasi Sistem Industri Vol. 11 No. 2 (2012): Published in October 2012
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v11.n2.p265-278.2012

Abstract

Small and medium enterprises in Indonesia gave big contributions to create job opportunities for community and increased Gross Domestic Product. Unfortunately, the current SMEs did not get any respect from the government. This is evidenced by many problems that happened with SMEs in Indonesia. Agency Statistic Center conducted survey in 2009 and 2010 and identified causes of the problems are availability of raw materials, financial problem, marketing, fuel or energy, transportation, skills, payment and many others. Formulation of the problems is how to design indicators of innovation that can be used to make policy strategies to solve the problems. The objective of research is to recommend some innovation indicators for spare part in Padang and use the indicators to make innovation policies. Method to determine the ability innovation of spare parts industries is Quality Function Deployment (QFD). The first stage is identify consumer needs. Consumer needs obtained from literatures and interviewed of stakeholders. Then, calculated based on customer importance ratings to obtain critical and non critical indicators. Indicators will be presented into the House of Quality (HOQ). The results of HOQ are determined some strategies by using SWOT analysis. This research result obtained 25 innovation indicators of technology that is divided into three aspects such as technology aspects, design and product quality aspects. Strategy formulation from SWOT analysis result some strategies with 4 categories and among of them are SO strategy (4 strategies), WO strategy (5 strategies), ST strategy (4 strategies), and WT strategy (3 strategies). Besides that, strategy architecture will present strategy implementation for 10 years and completed with some people that have participation to make this strategy implementation successful.
PERANCANGAN MODEL PENGUKURAN KINERJA LEAN DAN GREEN RANTAI PASOK SEMEN SECARA TERINTEGRASI Rahmayanti, Dina; Putri, Utari
Jurnal Optimasi Sistem Industri Vol. 10 No. 2 (2011): Published in October 2011
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v10.n2.p135-144.2011

Abstract

PT. Semen Padang is one of the reputable cement companies in Indonesia which is producing types of cement. Implementation of supply chain concept in PT. Semen Padang is very important to satisfy customers and stakeholders requirement. Performance measurement is a process to evaluate the supply chain effectiveness and efficiency in lean and green aspect. The problem is how to design performance measurement model which is integrating lean and green supply chain concepts. The objective of research is integrating lean and green supply chain concepts to design supply chain performance measurement of bag cement type. Integration of lean and green concept is designed by Balanced Scorecard (BSC) perspectives that consist of financial, customer, internal process business and learning and growth. Key performance indicators (KPI) are formulated and classified based on BSC perspectives. Next stage is pair wise comparison process to the weight value. Evaluation of KPI pair wise comparison based is conducted on expert opinion which is selected by consideration of their relevance knowledge and experience. The process of pair wise comparison is calculated to determine priority of the KPIs based on weight value by using Analytical Hierarchy Process (AHP) method. The weight of KPI will be arrange by descending to determine the priority. Model of performance measurement is validated by face validity method. Research result is obtaining 25 KPIs that derived from integration of lean and green supply chain concept of bag cement type. Grouping is consisting of 3 KPIs of financial, 4 KPIs of customer, 11 KPI s of internal process business and 7 KPI s of learning & growth. Result is showing that customer is most prioritized element in supply chain of bag cement type. Implementation of proposing model is coordination of departments and employee in context of information accessibility.
Minimasi Pemborosan pada Lantai Produksi PT Kunango Jantan dengan Pendekatan Lean Manufacturing Rahmayanti, Dina; Qomariah, Nurul
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 6 No. 4 (2023): Oktober
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v6i4.18080

Abstract

PT Kunango Jantan is one of the private companies engaged in manufacturing and trading. One of the products produced is Street Light Pole (PJU). The production of these PJU poles also faces various challenges. Commonly faced challenges are related to several types of waste on the production floor. This research aims to identify waste on the production floor of PJU poles using a lean manufacturing approach. The results indicate that the top three waste percentages are 18.9% for transportation activities, 17.62% for waiting activities, and 15.46% for defects. Some factors causing these wastages include frequent machine breakdowns, depletion of raw materials due to the lack of raw material scheduling implementation, and frequent transportation during production. Improvement recommendations to reduce waste include scheduling machine maintenance, planning raw material control, and adjusting machine layouts to minimize repetitive transportation.
Design Konseptual Model Pengelolaan Sampah di Kota Padang Rahmayanti, Dina; Meuthia, Yumi; Aqila, Andini
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 7 No. 3 (2024): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v7i3.28157

Abstract

The increase in waste at the Padang City landfill (TPA) each year is caused by population growth and the imbalance between the amount of waste generated and the waste processing facilities at the source. As a result, inadequately processed waste at waste banks, TPS3R, and TPST ends up in the landfill, where space is increasingly limited. This study uses a Causal Loop Diagram (CLD) to identify and analyze the waste management and disposal system in Padang City and its impact on overall waste management. The conceptual model is created with three CLD submodels: the population submodel, the waste at source submodel, and the waste processing submodel. This study concludes that a more dynamic approach and comprehensive analysis of all aspects of waste management are needed to reduce waste accumulation at the landfill and increase its capacity in the future. The conceptual waste management model developed serves as an initial step in creating a dynamic system that can help solve waste problems effectively and sustainably.