scholarly journals USULAN PENJADWALAN PRODUKSI PRODUK ST 37777 PT EBAKO NUSANTARA PADA DEPARTEMEN SMOOTHMILLING UNTUK MEMINIMASI MAKESPAN

2018 ◽  
Vol 13 (1) ◽  
pp. 61
Author(s):  
Mellysa Asmawar
Keyword(s):  
Production Process ◽  
Processing Time ◽  
Manufacturing Industry ◽  
Job Scheduling ◽  
Makespan Minimization ◽  
Central Java ◽  
Short Processing Time ◽  
Jobshop Scheduling ◽  
Machine Work

AbstrakProses produksi ST 37777 di PT Ebako Nusantara menggunakan jadwal yang didasarkan oleh proses-proses yang dilakukan dengan menggunakan data historis yang telah ada dari proses produksi yang telah dilakukan. PT Ebako Nusantara merupakan industri manufaktur yang bergerak di bidang furnitur yang berlokasi di Terboyo, Semarang, Jawa Tengah. Dalam proses produksi ST 37777, terdapat 11 mesin dan 16 job dimana setiap job memiliki urutan mesin yang berbeda. Penjadwalan yang ada untuk produk tipe ST 37777 dengan tipe jobshop belum menerapkan suatu ketetapan dalam penentuan waktu dan urutan pengerjaan mesin yang efektif sehingga masih banyak job yang selesai terlambat. Untuk itu diperlukan suatu penjadwalan mesin yang efektif sehingga dapat memenuhi waktu produksi pesanan sesuai dengan yang telah disepakati. Penjadwalan jobshop diperlukan untuk memaksimumkan efisiensi dan utilitas sumber daya di lantai produksi. Penentuan jadwal mesin ini bertujuan meminimasi makespan dengan menggunakan Software WINQSB modul job schedulling. Metode yang digunakan adalah metode Short Processing Time. Hasil penjadwalan menggunakan Software WINQSB diperoleh makespan menjadi 15 jam dengan hasil penjadwalan tersebut tidak ada job yang terlambat dan semua job dikerjakan berurutan. AbstractThe production process of ST 37777 in PT Ebako Nusantara uses a schedule based on the processes performed using existing historical data from the production process that has been done. PT Ebako Nusantara is a manufacturing industry engaged in furnitur located in Terboyo, Semarang, Central Java. In the production process ST 37777, there are 11 machines and 16 jobs where each job has a different sequence of machines. The existing scheduling for ST 37777 type product with jobshop type has not been applied a determination in the timing and sequence of effective machine work so that many jobs are finished too late. For that required an effective engine scheduling so that it can meet the production time of orders in accordance with the agreed. Jobshop scheduling is needed to maximize efficiency and resource utilities on the production floor. Determination of this machine schedule aims to minimize the makespan using WINQSB Software job scheduling module. The method used is the method of Short Processing Time. The scheduling result using WINQSB software obtained makespan to 15 hours with scheduling result no job is late and all job done in sequence. Keywords: Jobshop Scheduling; Short Processing Time; Makespan Minimization

Determination of Order Delivery Time in Event Organizer Industry Using a Non-Delay Scheduling Approach

2020 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Nur Indrianti ◽  
Vina Islamia Vervly Suandevin
Keyword(s):  
Production Process ◽  
Processing Time ◽  
Manufacturing Industry ◽  
Job Shop ◽  
Service Industries ◽  
Delivery Time ◽  
Priority Rules ◽  
Balanced Distribution ◽  
Spt Rule

This study discusses the determination of order delivery time in the event organizer (EO) industry. With regard to the characteristics of the EO production process that is identical to the job shop production process in the manufacturing industry, a non-delay scheduling approach is applied. The non-delay schedule is compiled using the non-delay algorithm with the criteria for makespan minimization. Job assignment is done using the shortest processing time (SPT), longest processing time (LPT), and first comes first served (FCFS) priority rules. We consider the situation where all orders arrive simultaneously (offline) and at different time (online). As a case study, the modified non-delay algorithm is examined to solve the problem of an EO in Indonesia. The results of the study show that the nondelay algorithm using SPT rule provides the best schedule performance which results in the shortest makespan and the lowest resource idle time. In addition to determining the delivery time, the resulting non-delay schedule can be used to control the execution of each order. The method of determining order delivery time in this study can be applied to other service industries. Further study can be developed for situations where order arrival and processing time are probabilistic. Furthermore, it is also necessary to consider the balanced distribution of the workload among operators. Determination of Order Delivery Time in Event

scholarly journals PENINGKATAN KAPASITAS PRODUKSI MELALUI PENERAPAN THEORY OF CONSTRAINT, PENJADWALAN MESIN PARALEL DAN BOTTLENECK SCHEDULING PADA PERUSAHAAN SHEET METAL WORK

2013 ◽  
Vol 3 (2) ◽  
Author(s):  
Sonia Nur Indah Suci ◽  
Nora Azmi ◽  
Sumiharni Batubara
Keyword(s):  
Processing Time ◽  
Parallel Machines ◽  
Job Scheduling ◽  
Production Capacity ◽  
Theory Of Constraints ◽  
Job Sequencing ◽  
Short Processing Time ◽  
Current Production ◽  
Scheduling Method ◽  
Theory Of Constraint

<p>This study aims to increase the production capacity of the server rack 08U Type Double ASeries<br />Wallmounted BRI on company X. Current production did not reached the expected target of<br />117 units / week because of the bottleneck workstation. The study began by identifying the bottleneck<br />workstation using the Theory of Constraints (TOC). The result of identification process showed two<br />bottleneck work stations, that are work station Punching and Ovencoating. The production capacity<br />was improved by performing the steps as follows: 1) Add 1 machine at punching station, 2) perform<br />job scheduling on parallel machines at punching station using Short Processing Time (SPT) criteria;<br />3) perform job sequencing on bending station using Weighted Shortest Processing Time (WSPT)<br />criteria; 4 ) adds overtime at ovencoating stations, and 5) implementing bottleneck scheduling method<br />to sequence all jobs. The Results of this study showed that makespan was reduced by 12.03% and<br />production capacity increased by 41.9% so that the production target of 117% can be achieved.</p>

scholarly journals Penjadwalan Produksi Garment Menggunakan Algoritma Heuristic Pour

2018 ◽  
Vol 5 (1) ◽  
pp. 81-89
Author(s):  
Rizal Rachman
Keyword(s):  
Production Process ◽  
Production Scheduling ◽  
Job Scheduling ◽  
Heuristic Method ◽  
Limited Resource ◽  
Limited Resources ◽  
Scheduling System ◽  
Short Processing Time ◽  
Time Calculation ◽  
Long Time

Abstrak Penjadwalan merupakan suatu kegiatan pengalokasian sumber daya yang terbatas untuk mengerjakan sejumlah pekerjaan. Proses penjadwalan timbul jika terdapat keterbatasan sumber daya yang dimiliki, karena pada saat ini perusahaan menerapkan sistem penjadwalan manual dimana dengan penjadwalan tersebut masih terdapat beberapa produk yang terlewati sehingga menyebabkan keterlambatan dalam proses produksi, aturan ini sering tidak menguntungkan bagi order yang membutuhkan waktu proses pendek karena apabila order itu berada dibelakang antrian maka harus menunggu lama sebelum diproses dan menyebabkan waktu penyelesaian seluruh order menjadi panjang, sehingga diperlukan adanya pengaturan sumber-sumber daya yang ada secara efisien. Adapun dasar perhitungan Penjadwalan dengan menggunakan algoritma Heuristic Pour. Tahapan-tahapan penelitian terdiri dari pengumpulan data, perhitungan waktu standar, perhitungan total waktu proses berdasarkan job, penjadwalan dengan metode awal perusahaan, penjadwalan dengan metode Heuristik Pour. Berdasarkan hasil penjadwalan menggunakan Heuristik Pour diperoleh penghematan dibanding dengan metode perusahaan saat ini, sehingga dapat digunakan sebagai alternatif metode dalam melakukan penjadwalan pengerjaan proses produksi di perusahaan Garment tersebut. Kata kunci: Penjadwalan Produksi, Algoritma, Heuristic Pour. Abstract Scheduling is a limited resource allocation activity to do a number of jobs. The scheduling process arises if there are limited resources available, because at this time the company implement a manual scheduling system where the scheduling is still there are some products passed so as to cause delays in the production process, this rule is often not profitable for orders that require short processing time because if the order is behind the queue then it must wait a long time before it is processed and cause the completion time of all orders to be long, so it is necessary to regulate the existing resources efficiently. The basic calculation of Scheduling using Heuristic Pour algorithm. The research stages consist of data collection, standard time calculation, total time calculation based on job, scheduling with company start method, scheduling with Pour Heuristic method. Based on the results of scheduling using Pour Heuristik obtained savings compared with the current company method, so it can be used as an alternative method in scheduling the process of production process in Garment company. Keywords: Production Scheduling, Algorithms, Heuristic Pour.

ANALISIS PERHITUNGAN HARGA POKOK PRODUKSI DAN PENENTUAN HARGA JUAL ATAS PRODUK (Studi Kasus Pada PT Dasa Windu Agung)

2016 ◽  
Vol 1 (2) ◽  
pp. 183-190
Author(s):  
Dwi Urip Wardoyo
Keyword(s):  
Manufacturing Industry ◽  
Sampling Method ◽  
Manufacturing Companies ◽  
Test Analysis ◽  
Automotive Components ◽  
Convenience Sampling ◽  
Cost Of Production ◽  
The Cost ◽  
Keywords Cost

This study aims to determine the determination of the cost of production for products produced by PT. DWA. The Company is engaged in the manufacturing industry specialized in automotive components. Its activity is carried out through a series of production processes, so that expenses spent in the production will be calculated into the cost of the production sold. The population in this study were all manufacturing companies in Jakarta. Convenience sampling method selected one of the companies that get the confidence to assemble three national car project in Indonesia, namely Timor, Bakrie and Maleo. Test analysis used in this study is to test the calculation of full costing with job order costing. This study shows that (a) determination of the cost elements associated with the cost of production and (b) determining the cost of production on a product-based job costing with full costing approach. Keywords: cost of production, full costing

Research on Jobshop Scheduling Problem with Energy Consumption

2011 ◽  
Vol 314-316 ◽  
pp. 2071-2075
Author(s):  
Jia Hai Wang ◽  
Wen Tao Gong
Keyword(s):  
Mathematical Model ◽  
Energy Consumption ◽  
Processing Time ◽  
Electric Energy ◽  
Low Carbon ◽  
Load Shifting ◽  
Electric Energy Consumption ◽  
Jobshop Scheduling ◽  
Time Division ◽  
The Mathematical Model

Discrete machine manufacture enterprises have to induce new low-carbon manufacturing model in order to solve a dilemma of mutual restraint between development and electric energy consumption. The paper presents an approach to solve JSP with the objective of minimizing the energy consumption by shortening the distance between electricity peak and valley according to theory of load shifting in electricity. The mathematical model is proposed for JSP with objective of minimizing the energy consumption and processing time of entire batch, then the idea of time division is introduced, and a solving method based on GA built-in eM-Plant is employed to verify the model and get satisfactory scheduling results.Discrete machine manufacture enterprises have to induce new low-carbon manufacturing model in order to solve a dilemma of mutual restraint between development and electric energy consumption. The paper presents an approach to solve JSP with the objective of minimizing the energy consumption by shortening the distance between electricity peak and valley according to theory of load shifting in electricity. The mathematical model is proposed for JSP with objective of minimizing the energy consumption and processing time of entire batch, then the idea of time division is introduced, and a solving method based on GA built-in eM-Plant is employed to verify the model and get satisfactory scheduling results.

Determination of lethality and processing time in a continuous sterilization system containing particulates

1990 ◽  
Vol 11 (1) ◽  
pp. 67-92 ◽  
Author(s):  
Jun Ho Lee ◽  
Rakesh K. Singh ◽  
John W. Larkin
Keyword(s):  
Processing Time

scholarly journals Productivity Analysis Of Filling Machine With The Objective Matrix (OMAX) Method

2021 ◽  
Vol 6 (1) ◽  
pp. 32-39
Author(s):  
Katrin Sinaga ◽  
Kevin Lie ◽  
Nico Williams ◽  
Theresia Sunarni
Keyword(s):  
Production Line ◽  
Manufacturing Industry ◽  
Working Hours ◽  
Productivity Analysis ◽  
Productivity Measurement ◽  
Productivity Level ◽  
Increase In Productivity ◽  
Productivity Ratio

A Factory is a manufacturing industry that produces tea drinks in cups. A Factory is also inseparable from problems related to machine/equipment productivity. Based on the results of observations made at A Factory part of the production line that there is often a sudden stop of the production process. The discontinuation will affect the quality of the product expected and the production targets to be achieved. The problem was discussed in this research is how much the productivity level of the filling production department is, how much the production effectiveness, effective working hours, the number of defective products, and machine downtime criteria. The productivity measurement method used is the Objective Matrix (OMAX) method, so the steps of this study refer to OMAX steps, which is the criteria determination/productivity ratio of the production line, the calculation of the productivity ratio value, the calculation of the initial standard score (score 3), The determination of the goal (score 10) and the lowest score (score 0), the determination of weight, the calculation of value/criteria value, the determination of productivity value for each period, determination of index percentage. With the OMAX method, it can be seen that in period 11 (compared to period 10) there was an increase in productivity, this can be seen because the IP value (Index of Performance) which is positive (+) is 27.79 and there is an increase in the value of the calculation at the time of measurement (current) from 383.36 to 300. This increase was due to an increase in the value of all criteria.

scholarly journals Determination of earnings management: An application in BISTKazanç yönetiminin tespiti: BIST’de bir uygulama

2016 ◽  
Vol 13 (3) ◽  
pp. 6080
Author(s):  
Meral Gündüz
Keyword(s):  
Earnings Management ◽  
Financial Reporting ◽  
Manufacturing Industry ◽  
Discretionary Accruals ◽  
Financial Information ◽  
Accounting System ◽  
Reporting Process ◽  
Management Application ◽  
Jones Model

Companies, by use of the flexibility of alternative applications in accounting system, apply profit management by organizing the financial tables unequal to the real situations. Profit management is to interfere external financial reporting process in order to gain special profits. With profit management, the main aim is to affect decisions and plans of the investors and the other financial information usersEarnings management is a kind of management which uses accounting techniques to meet the executives needs for earnings; it is a widely debated topic, hence it is worth looking at. Experts and professionals in this area found many approaches to detect the earnings management; within these approaches are the accrual-based models which include the modified Jones model, which currently is a favourite model to many researchers. In the study is aim to determine the earnings management application the data of 81 companies which were in business in Istanbul stock market (BIST-100) manufacturing industry between the years 2013-2015 is used. In this study regression analysis was made by using Modified Jones model and investigated whether their earnings management application or not , has also targeted to determine the companies applying for earnings management.The distribution of the average of discretionary accruals calculated for years as each company is analyzed; average of discretionary accruals shows a normal distribution, in this situation, It was concluded that there was no impact on the economic development of total accruals, depending on the establisded regression model. It can be expressed that the companies were in tendency to increase revenues for 2014 year and to decrease in revenue for 2013 and 2015 years.  In addition, companies which tend to manipulation in this study were identified. Özetİşletmeler, muhasebe sistemindeki alternatif uygulamaların sağladığı esneklikten yararlanarak, finansal tabloları gerçekte olduğundan farklı gösterecek şekilde düzenlemek suretiyle kazanç yönetimi uygularlar. Kazanç yönetimi, özel kazançlar elde etmeye yönelik dışsal finansal raporlama sürecine bu amaçlara uygun olarak müdahale etmektir. Kazanç yönetimi ile yatırımcıların ve diğer finansal bilgi kullanıcılarının karar ve düşüncelerini etkilemek amaçlanmaktadır.Kazanç yönetimi, yöneticilerin kazanç ihtiyaçlarını karşılamak amacıyla kullandıkları çok tartışılan bu yüzden araştırılmaya değer bir yöntemdir. Bu alanda uzman ve profesyoneller kazanç yönetimini tespit etmek için birçok yaklaşımı bulmuşlardır ki bu yaklaşımlar arasında birçok araştırmacı tarafından favori model kabul edilen tahakkuk esaslı Düzeltilmiş Jones Modelidir.Kazanç yönetimi uygulamalarının belirlenmesini amaçlayan bu çalışmada, BİST 100 endeksindeki 81 şirketin 2013-2015 yılları arasındaki verilerinden faydalanılmıştır. Araştırmada literatürde yer alan Düzeltilmiş Jones Modeli kullanılarak regresyon analizi yapılmış ve bu yöntemle şirketlerin kazanç yönetimi uygulaması yapıp yapmadığı araştırılmış, ayrıca kazanç yönetimi uygulayan şirketlerin belirlenmesine yönelik çalışma hedeflenmiştir. Yıllar itibariyle her bir şirket için hesaplanan ihtiyari tahakkukların ortalamalarının dağılımı incelendiğinde; ihtiyari tahakkukların ortalamalarının normal dağılım gösterdiği, bu durumunda kurulan regresyon modeline bağlı olarak toplam tahakkuklar üzerinde ekonomik gelişmelerin bir etkisinin olmadığı sonucuna varılmıştır.  Analiz sonucuna göre şirketlerin 2013 ve 2015 yıllarında gelir azaltıcı ve 2014 yılında gelir artırıcı bir manipülasyon eğiliminde oldukları ifade edilebilir. Ayrıca bu çalışmada kazanç yönetimi eğiliminde olan şirketler belirlenmiştir.

scholarly journals Determination of Scandium in mafic and ultramafic rocks of ophiolites from Luk Ulo Complex, Karangsambung, Central Java, Indonesia

2020 ◽  
Vol 200 ◽  
pp. 06003
Author(s):  
Nugroho Imam Setiawan ◽  
Kardo Polarman Rajoki Silitonga ◽  
Fahmi Adiyatma Makkaratte ◽  
Chusni Ansori
Keyword(s):  
Mineral Composition ◽  
General Trend ◽  
Elemental Abundance ◽  
Ultramafic Rocks ◽  
Mining Activities ◽  
Central Java ◽  
Parent Rocks ◽  
Modern Industry

Scandium (Sc) is important element for its utilization in modern industry. Initial Sc content in the parent rocks primary importance controlling the Sc concentrations in its weathered derivatives. This contribution examines the Sc concentrations in parent rocks of mafic and ultramafic rocks related to the ophiolite series in Luk Ulo Complex, Karangsambung, Central Java, Indonesia. The ophiolite series in this area are basalt, microgabbronorite, gabbronorite, websterite, and serpentinite from 5 locations of Medana, Lokidang, Parakansubah, Selogiri, and Pucangan areas. The general trend from the distribution of Sc in the ophiolite sequence of Medana and Parakansubah-Lokidang Rivers suggests the Sc contents increase from shallow to deeper levels of the sequence. The lowest concentrations of Sc in the ophiolite sequence of Medana and Parakansubah-Lokidang Rivers are in basalt, which are 24–29 ppm. In the middle sequence, the Sc concentrations are 27–34 ppm and 24–43 ppm, respectively in microgabbronorite and gabbronorite. The highest Sc concentrations are in websterite, which are 51–54 ppm, as the deepest sequence of the ophiolite in this area. Meanwhile, Sc contents in serpentinite from Selogiri and Pucangan areas are 5–11 ppm, which are considered the lowest Sc contents. It suggests that the pre-serpentinization mineral composition rather than the process of serpentinization determine the elemental abundance of Sc in serpentinite. The results are used to be an analog for Sc identification in the ophiolite belts in central Indonesia. This also considering that Luk Ulo Complex been established as National Geopark of Karangsambung-Karangbolong, so that mining activities are prohibited in this area.

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