scholarly journals Pengendalian Persediaan Bahan Baku Nalco Water Treatment Dengan Menggunakan Metode Lot Sizing

2019 ◽  
Vol 2 (2) ◽  
pp. 80
Author(s):  
Masad Hariyadi ◽  
Boy Isma Putra
Keyword(s):  
Water Treatment ◽  
Raw Materials ◽  
Unit Cost ◽  
Exponential Smoothing ◽  
Raw Material ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Order Quantity ◽  
Double Exponential ◽  
Double Exponential Smoothing

The limited supply of Nalco raw materials from producers has become a problem for PT ABC, this has led to the control of raw material inventory at PT ABC not including good management, because in the management of raw materials the company still records inventory with manual systems and in ordering raw materials only based on estimates. From the results of the study, the forecasting method used is the Double Exponential Smoothing Holt's, Brown, and Holt Winters Additive Algorithm methods, from the three methods that are most suitable is the Double Exponential Smoothing Brown method with the smallest Mean Square Error of 256.2. Calculation of Sizing Lot by using Economic Order Quantity method, Least Unit Cost method, and Silver Meal method, of the three methods the most optimal is the Economic Order Quantity method because it has the lowest cost of Rp. 12,651,145. The calculation of Safety Stock gets 17 Pail results. and for Reorder Points for Nalco Water Treatment raw material, which is 29 Pail.

scholarly journals USULAN TOTAL BIAYA PERSEDIAAN PEREAKSI PADA LABORATORIUM KIMIA DI PT XYZ

2021 ◽  
Vol 2 (1) ◽  
pp. 13-19
Author(s):  
Sambas Sundana ◽  
Resti Febriani Putri
Keyword(s):  
Moving Average ◽  
Exponential Smoothing ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Order Quantity ◽  
Double Exponential ◽  
Double Exponential Smoothing ◽  
Single Exponential ◽  
Weighted Moving Average

Masalah yang dihadapi perusahaan selama  tahun 2020 terjadi stock out sebanyak tiga kali dengan total empat botol yang mengakibatkan adanya biaya tambahan berupa biaya pemesanan sedangkan tujuan dari penelitian ini yaitu menghitung peramalan pereaksi kalium iodida berdasarkan data historis pemesanan, menghitung persediaan pereaksi kalium iodida menggunakan metode  economic order quantity (EOQ), dan  menghitung total biaya yang dibutuhkan untuk melakukan pemesanan pereaksi kalium iodida dalam satu tahun. Metode  Peramalan  yang dipakai yaitu Moving Average (MA, n = 3), Peramalan Moving Average (MA, n = 4), Peramalan Weighted Moving Average (WMA, n = 3), Peramalan Weighted Moving Average (WMA, n = 4), Peramalan Single Exponential Smoothing (SES, alpha = 0,5), Peramalan Single Exponential Smoothing (SES, alpha = 0,4), Peramalan Double Exponential Smoothing (DES, alpha = 0,5), Peramalan Double Exponential Smoothing (DES, alpha = 0,4), Peramalan Double Exponential Smoothing (DES, alpha = 0,4),Metode EOQ dan total biaya. Hasil yang diperoleh metode peramalan yang dipilih yaitu MA dengan n sama dengan empat, dimana peramalan yang dihasilkan menunjukkan jumlah pemesanan pereaksi tiap periode sebesar 3 botol dengan total pemesanan tahun 2021 sebanyak 36 botol,.EOQ sebanyak 9 botol,.dan Total Biaya Persediaan Pereaksi Kalium Iodida Rp. 64.577.143

scholarly journals ANALYSIS CONTROL SUPPLIES RAW MATERIALS TO EFFICIENCY COST, USING THE METHOD OF ECONOMIC QUANTITY ORDER AT CV. PQR

2018 ◽  
Vol 1 (01) ◽  
pp. 41
Author(s):  
Wartoyo Hadi
Keyword(s):  
Production Process ◽  
Raw Materials ◽  
Analysis Data ◽  
Raw Material ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Order Quantity ◽  
Safety Stock ◽  
Reorder Point ◽  
Efficiency Cost

The purpose of the implementation of this research is to find the effectiveness of supplies raw materials, the method of analysis data used in the square is the smallest trend for planning raw materials and controling supplies use method of economic order quantity (EOQ) analyze reorder point. Analysis reorder point and safety stock. And analyzes efficiency cost of raw materials. Forecasting raw materials years 20x7 according to the smallest trend, cloth and dakron happened the difference is greater than of the target needed (according to a company); controling supplies raw materials with the methods eoq in 20x7 more effective than reservations raw materials cloth and dakron and more efficient than cost raw materials. The company should review the policy of forecasting raw material supplies that had been undertaken and make planning supplies the raw material that more accurate using the firm’s historical data and not only targeting the output production next year, so that machines production can be optimized. Considering the use of control supplies with the methods economic order quantity to companies, so this analysis can determine material reservations, supplies safety, maximum supplies to avoid the risk of running out of raw materials, because the companies often happened less dressed up a result of reservations that time is inaccurate, the lack of safety stock and the deferred the delivery of goods which often disturb the production process, by this method can prevent these things, so that the production process can run smoothly and minimize the cost of raw materials supplies.

scholarly journals PERENCANAAN DAN PENGENDALIAN PERSEDIAAN BAHAN BAKU PAIL CAT MENGGUNAKAN METODE MATERIAL REQUIRMENT PLANNING (MRP) PADA PT. XYZ

JUMINTEN ◽  
2020 ◽  
Vol 1 (4) ◽  
pp. 163-172
Author(s):  
Vify Elviana ◽  
Akmal Suryadi
Keyword(s):  
Inventory Management ◽  
Consumer Demand ◽  
Raw Materials ◽  
Raw Material ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Order Quantity ◽  
Material Requirements Planning ◽  
Total Cost ◽  
Material Requirements

Persediaan merupakan aset perusahaan yang memiliki peran penting dalam operasi bisnis, sehingga perusahaan penting untuk melakukan manajemen persediaan yang baik, artinya perusahaan harus mampu mengantisipasi kendala maupun tantangan yang ada dalam pengelolahan persediaan untuk meminimalisasi total biaya yang harus dikeluarkan oleh perusahaan. Permasalahan yang timbul pada persediaan bahan baku di PT XYZ adalah perusahaan melakukan perencanaan dan pengendalian bahan baku hanya berdasarkan pada pengalaman-pengalaman sebelumnya dan tidak berdasarkan pada metode yang sudah baku. Oleh karena itu pembelian bahan baku tidak sesuai dengan permintaan konsumen. Hal tersebut sering menyebabkan terjadinya kelebihan maupun kekurangan stok bahan baku. Kesalahan dalam penentuan besarnya investasi dalam persediaan akan mengurangi keuntungan perusahaan. Adanya persediaan bahan baku yang terlalu besar, akan menambah beban biaya pemeliharaan dan penyimpanan dalam gudang, serta kemungkinan terjadinya penurunan kualitas bahan baku yang dapat menyebabkan berkurangnya keuntungan perusahaan. Namun jika persediaan bahan baku terlalu sedikit maka akan berakibat pada terhambatnya proses produksi, sehingga tidak terpenuhinya permintaan konsumen. Hasil penelitian ini dapat menyimpulkan bahwa perencanaan kebutuhan bahan baku dengan metode perusahaan didapatkan total cost sebesar Rp 1.796.762.429,-, sedangkan metode Material Requirements Planning (MRP) didapatkan total cost sebesar Rp 1.576.011.801,-. Maka dapat disimpulkan telah terjadi penurunan total cost seluruh bahan baku sebesar 12,28%. Hal ini membuktikan bahwa metode Material Requirements Planning (MRP) lebih efisien daripada metode PT. XYZ. Oleh karena itu untuk mendapatkan total cost yang minimum, metode Material Requirements Planning (MRP) diterapkan pada periode Februari-Juni 2020 sehingga didapatkan total cost sebesar Rp 1.576.011.801,-. Kata Kunci:         Material Requirements Planning (MRP), PT XYZ, Pail Cat, Economic Order Quantity (EOQ), Period Order Quantity (POQ), Lot For Lot (LFL). ABSTRACT                     Inventory is a company asset that has an important role in business operations, so the company is important to conduct good inventory management, meaning that the company must be able to anticipate obstacles and challenges that exist in managing inventory to minimize the total cost to be incurred by the company.The problem that arises in the supply of raw materials in PT XYZ is that the company plans and controls raw materials based only on previous experiences and not based on established methods. Therefore, the purchase of raw materials is not in accordance with consumer demand. This often leads to excess or shortage of raw material stock. Mistakes in determining the amount of investment in inventories will reduce company profits. The availability of raw materials that are too large, will add to the burden of maintenance and storage costs in the warehouse, as well as the possibility of a decline in the quality of raw materials that can lead to reduced company profits. However, if the supply of raw materials is too little, it will result in obstruction of the production process, so that consumer demand is not fulfilled. The results of this study can conclude that the planning of raw material needs by the company method obtained a total cost of Rp 1,796,762,429, - while the Material Requirements Planning (MRP) method obtained a total cost of Rp 1,576,011,801, -. Then it can be concluded that there has been a decrease in the total cost of all raw materials by 12.28%. This proves that the Material Requirements Planning (MRP) method is more efficient than the PT. XYZ. Therefore, to get the minimum total cost, the Material Requirements Planning (MRP) method was applied in the February-June 2020 period so that a total cost of Rp 1,576,011,801 was obtained.   KeyWords: Material Requirements Planning (MRP), PT XYZ, Pail Cat, Economic Order Quantity (EOQ), Period Order Quantity (POQ), Lot for Lot (LFL).

scholarly journals PENGENDALIAN PERSEDIAAN BAHAN BAKU DALAM PROSES PRODUKSI DENGAN MENGGUNAKAN METODE ECONOMIC ORDER QUANTITY (EOQ)

2019 ◽  
Vol 1 (2) ◽  
pp. 415-423
Author(s):  
Elia Rahayu R ◽  
Nor Norisanti ◽  
Acep Samsudin
Keyword(s):  
Raw Materials ◽  
Raw Material ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Order Quantity ◽  
Analysis Method ◽  
Inventory Cost ◽  
Total Inventory ◽  
The Difference ◽  
Quantitative Descriptive

The purpose of this study is to control the supply of raw materials using the Economic Order Quantity (EOQ) method in Tahu Nugraha Jaya Sukabumi UKM. The data analysis method used is quantitative descriptive to describe and describe the data to be examined and then processed using EOQ. This study uses the EOQ method to determine the total inventory cost. The data needed in this study are the number of purchases of raw materials, the amount of use of raw materials, storage costs, and ordering costs. The results of this study indicate that by applying the EOQ method can further optimize the supply of raw materials by minimizing raw materials with increased inventory. With the application of the Economic Order Quantity (EOQ) method it shows more efficient than conventional methods of the company. Conclusions, seen from the difference in the TIC of the two methods, the more efficient method is the Economic Order Quantity (EOQ) method that is equal to 244,392.94 while the calculation used by the company is 374,325. so that it can be obtained that there is a difference between the Company TIC and the EIC method TIC. Keywords: Raw Material Inventory, Production Process

OPTIMALISASI PENGADAAN BAHAN BAKU DALAM RANGKA MEMINIMALKAN TOTAL BIAYA PERSEDIAAN TEMBAKAU PADA PT BENTOEL INTERNATIONAL INVESTAMA DI MALANG

2019 ◽  
Vol 2 (1) ◽  
pp. 23
Author(s):  
Dwi Dayanti Oktavia ◽  
Peni Indarwati ◽  
Marhaerni Fikky Febriananta
Keyword(s):  
Production Process ◽  
Raw Materials ◽  
Cost Savings ◽  
Optimal Level ◽  
Raw Material ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Order Quantity ◽  
Total Cost ◽  
The Cost

A company should maintain an adequate or optimal level of inventory so that production operations can run smoothly and efficiently. What needs to be considered in this case is that the required raw materials are always available, so as to guarantee the smooth production process. However, the amount of inventory should not be too much because this will harm the company. Too much inventory will increase maintenance costs and storage costs in the warehouse. In addition, the amount of inventory that is too much can also increase the likelihood of losses due to damage and loss of quality that can reduce company profits. And vice versa, the amount of inventory that is too small will hamper the production process so that the company will suffer a lot of losses including: the machine does not work as it should, many workers are unemployed, and can even result in the cessation of the production process. This study aims to determine how the calculation of raw materials, what is the total cost of raw material inventory if the company establishes an EOQ (Economic Order Quantity) policy, what is the limit or point of ordering raw materials needed by the company during the grace period at PT.Bentoel International Investama in Malang.The population used is the supply of tobacco raw materials at PT. Bentoel International Investama, where this research was conducted by interview and documentation. The variable in this study is the supply of raw materials. The analysis used is the EOQ (Economic Order Quantity) method.The results of the study, if using the EOQ method in 2017 the cost savings of Rp 40,290,256,931, while in 2018 the cost savings of Rp. 44,388,428,549. Thus there is a difference between inventory policies carried out according to the company with EOQ calculations. It can be concluded that the supply of raw materials every year has increased raw materials, the frequency of purchasing raw materials when using raw materials when using the EOQ method is 2 times in one period, the limit for ordering raw materials needed by companies when using the 2017 EOQ method is 218,176.7 kg, while in 2018 it will be 210,853 kg. The total cost of raw material inventory calculated according to EOQ is less than that spent by the company, so there is a cost savings of raw material inventory

scholarly journals ANALISIS BIAYA PERSEDIAAN BAHAN BAKU IKAN DAN PERHITUNGAN ECONOMIC ORDER QUANTITY (EOQ) PADA RUMAH MAKAN IKAN BAKAR KINAMANG

2018 ◽  
Vol 13 (02) ◽  
Author(s):  
Melinda Miranda Wijaya ◽  
David P. E. Saerang ◽  
Meily Y. B. Kalalo
Keyword(s):  
Raw Materials ◽  
Raw Material ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Order Quantity ◽  
Inventory Cost ◽  
Safety Stock ◽  
Purchase Order ◽  
Reorder Point ◽  
The Cost

            The cost of raw material inventory is a sacrifice of economic resources, measured in units of money, which have occurred or are likely to occur for raw material inventory, consisting of purchase costs, storage costs, and inventory shortage. This study aims to determine (1) Total Inventory Cost (TIC) based on RM policy. Kinamang Fuel Fish and Economic Order Quantity (EOQ) method during 2017 (2) Frequency of ordering of efficient fish raw material during 2017 (3) Quantity of safety stock and when to reorder point of raw materials fish in RM. Ikan Bakar Kinamang during 2017. This research is a descriptive research with qualitative approach. And use case study method. The result of the research shows that the Cost of Fish Raw Material Supplies at Kinamang Fuel Fish Restaurant is still not economical because the purchase (order) is only based on the previous sales estimate, and does not take into account economically the expenses incurred for the purchase and storage of fish raw materials the. Precisely with the calculation of Economic Order Quantity (EOQ), the cost of raw materials inventory of fish is much less, and can determine properly and correctly about the safety stock (safety stock), and reorder (reorder point).Keywords: Inventory Cost, EOQ, Frequency, Safety Stock, ROP

ANALISIS PENGENDALIAN PERSEDIAAN DENGAN METODE EOQ USAHA STAN KAYU SINAR SOWI KABUPATEN MANOKWARI

2020 ◽  
Vol 2 (2) ◽  
pp. 340
Author(s):  
Rizkyani Pratama ◽  
Yulius H Saptomo ◽  
Dirarini Sudarwadi
Keyword(s):  
Raw Materials ◽  
Case Study Research ◽  
Cost Savings ◽  
Raw Material ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Order Quantity ◽  
Inventory Cost ◽  
Total Inventory

Controlling and determining of inventory is an important thing in order to produce efficiently and able to make smooth sales. The purpose of this research is to know an analysis of controlling raw material inventoriesin the manufacture of brick by using Economic Order Quantity (EOQ) method to increase efficiency of the total inventory costin Stan Kayu Sinar Sowi. The raw material of brick is rough sand and cements. Type of case study research through a qualitative approach by means of interviews, observation and documentation. Case study on a wood booth business in Manokwari, West Papua. The results of the study that the purchase of raw materials made by the company is considered less efficient, because company policies tend to cause expenditure to be greater in the amount of Rp.606,620,250 for 12 months (1 period), while using the Economic Order Quantity (EOQ) method will issue a fee of Rp.550,712,500 for the same period. Using the Economic Order Quantity (EOQ) method, the order quantity is higher and the order frequency will be lower, resulting in order cost savings and increasing the total inventory cost efficiency.

scholarly journals Tinjauan Kapasitas Persediaan Produk Fuji Seat PT. Tri Jaya Teknik Karawang

2021 ◽  
Vol 5 (1) ◽  
pp. 33
Author(s):  
Aries Adiyanto ◽  
Dene Herwanto
Keyword(s):  
Raw Materials ◽  
Raw Material ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Order Quantity ◽  
Administrative Costs ◽  
Eoq Model ◽  
Engineering Company ◽  
Holding Cost ◽  
The Cost

PT. Tri Jaya Teknik Karawang is an engineering company engaged in fabrication, machining and side parts. PT. Tri Jaya Teknik started pioneering a business since 2007 and started owning and occupying its own workshop in 2009. Currently the company already has 2 plant workshops with a total area of 3,080 m2 and has about 100 employees. One of the products produced is Fuji seat, based on the data collected there are 3 parts of the process. The 3 parts of the process are repair 1, repair 2, repair 3. With each there is a check parts & packing table. The method used in companies to manage raw material inventories is still conventional, namely by making continuous purchases without estimating according to needs. So that there is often an excess of raw materials or a shortage of raw materials at a certain time, this makes the costs incurred inefficient and often disrupts the production process. A review of the inventory capacity of Fuji Seat products in this study was carried out using the Economic Order Quantity (EOQ) model. The main raw material inventory data used is Fuji Seat in the 2016-2019 period. Holding cost raw materials is set by PT. Tri Jaya Teknik Karawang is 2.5% of the price per pcs, this value is used for procurement and repair of tools and equipment in the warehouse. If there is no damage, the cost is allocated to the warehouse manager in that month. Meanwhile, the cost of ordering which consists of the price of goods and shipping costs is determined by PT. Tri Jaya Teknik Karawang, amounting to IDR 100,000.00. This fee includes administration and transportation costs. Administrative costs, namely executive salaries and other supporters, as well as taxes related to the company. The cost of shipping transport is the distance traveled and the weight of the product ordered. Based on the calculation of EOQ (Economic Order Quantity), the most economical amount of raw materials using the EOQ model is 6,815.5 Pcs with 187 purchases a year. PT. Tri Jaya Teknik Karawang adalah perusahaan engineering yang bergerak di bidang fabrikasi, machining dan part samping. PT. Tri Jaya Teknik mulai merintis bisnis sejak tahun 2007 dan mulai memiliki dan menempati workshop sendiri di tahun 2009. Saat ini perusahaan telah memiliki 2 plant workshop dengan total luas 3.080 m2 dan memiliki karyawan berjumlah sekitar 100 orang. Salah satu produk yang dihasilkan adalah fuji seat, berdasarkan data yang dikumpulkan ada 3 bagian proses. 3 bagian proses itu adalah repair 1, repair 2, repair 3. Dengan masing-masing terdapat meja check part & packing. Metode yang digunakan pada perusahaan untuk mengelola persediaan bahan baku masih secara konvensional, yaitu dengan melakukan pembelian terus menerus tanpa memperkirakan sesuai dengan kebutuhan. Sehingga seringkali terjadi kelebihan bahan baku atau kekurangan bahan baku di saat tertentu, hal ini membuat biaya yang dikeluarkan menjadi tidak efisien dan sering kali mengganggu proses produksi. Tujuan penelitian ini yaitu mampu mengetahui perhitungan EOQ dan frekuensi pembelian yang paling ekonomis dalam perusahaan. Tinjauan kapasitas persediaan produk Fuji Seat dalam penelitian ini dilakukan dengan menggunakan model Economic Order Quantity (EOQ). Data persediaan bahan baku utama yang digunakan adalah Fuji Seat pada periode 2016-2019.Biaya penyimpanan bahan baku di tetapkan oleh pihak PT. Tri Jaya Teknik Karawang sebesar 2,5% dari harga per pcs, nilai tersebut digunakan untuk keperluan pengadaan dan perbaikan 

scholarly journals Raw Material Analysis control of SMBE Slipper Producer using Economic Order Quantity

2021 ◽  
Vol 328 ◽  
pp. 05011
Author(s):  
Sabarudin Ahmad ◽  
Mualim Mualim ◽  
Sugeng Purwoko ◽  
Rifky Yusron
Keyword(s):  
Raw Materials ◽  
Raw Material ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Business Enterprise ◽  
Market Demand ◽  
Order Quantity ◽  
Inventory Models ◽  
Monthly Cost ◽  
Market Requirement

The growth of small-medium business enterprise in Indonesia is getting faster in decade, including small-medium business enterprise who produce slippers. SISCO is one of small-medium business enterprise who produce slipper. They must keep tight with market requirement. The supply of raw materials in a small-medium business enterprise is one of the important during production process. In some case their products are mismatch number from market demand. It can be worse if there a mismatch between raw materials ordering schedule from supplier and market demand from consumers. One of this problem requires Economic Order Quantity method as a solution, because during slippers production we have to order from supplier. Inventories are materials stored as raw materials, then they processed be finish product. To find out inventory, one of the inventory models used is the economic order quantity model. This method seeks to achieve the minimum possibility of inventory levels and lower costs and better quality. Economic Order Quantity method calculation based on raw material inventory control in SISCO slipper brand. Optimum monthly cost is IDR 5.293.541,03 to meet supply materials.

scholarly journals ANALISIS PERSEDIAAN BAHAN BAKU PADA AGROINDUSTRI KRIPIK BUAH SANUR DI KABUPATEN MALANG

2017 ◽  
Vol 10 (1) ◽  
pp. 47
Author(s):  
Nineng Puspito Ratih ◽  
Anik Suwandari ◽  
M Rondhi
Keyword(s):  
Production Process ◽  
Raw Materials ◽  
Point Method ◽  
Raw Material ◽  
Economic Order Quantity ◽  
Economic Order ◽  
Order Quantity ◽  
Traditional Methods ◽  
Safety Stock ◽  
Key Informant

Various fruits can be tranformed into delicious edible foods like chips. That was a basic idea which inspired “Sanur” Fruit Chips Agroinduntry to make chips which based on fruits processing. This agroindustry still performs traditional methods to manage its fruit inventory as raw material. This lead to a fluctuation and uncertainty in inventory stock. The traditional inventory in this agroindustry also caused a bottleneck in production process. The research was aimed to : (1) determine the economic order quantity of fruit chips agroindustry. (2) determine the most efficient re-order point of inventory in “Sanur” Fruit Chips Agroindustry. The research was descriptive and analytical. The key informant was selected purposively based on some criteria. Data was collected by using interview and observation. The result showed that : (1) economic order quantity was more preferable than Lot for Lot and tradional methods. (2) the traditional re-order point method in “Sanur” fruit chips agroindustry was not efficient. It was indicated by the safety stock, the amount of procurement and the inventory of minimum raw materials which showed full uncertain.

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