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INVENTORY : Industrial Vocational E-Journal On Agroindustry
Published by Politeknik ATI Padang
ISSN : -     EISSN : 27231895     DOI : -
Core Subject : Engineering,
Control & Systems Engineering Engineering Industrial & Manufacturing Engineering
INVENTORY mainly focuses on applied research in Agro-industrial systems and its technology. Therefore, INVENTORY will only process and publish submitted research articles or review articles in the area of: 1. Production Planning and Inventory Control 2. Ergonomic and Work Study 3. Product Design and Development 4. Optimization of Production System 5. Information System 6. Manufacturing Facility Design 7. Maintenance System 8. Energy and agro-industrial machinery 9. Related Topic in Industry 4.0 10. Warehouse 11. Procurement 12. Transportation and Distribution 13. Logistic Decision Making 14. Management and measurement of supply chain performance 15. Other related topics with an object of agro-industry, its products (food and non-food) and services (under the decision from editorial board)
Arjuna Subject : Teknik (semua kategori) - Tenik Industri dan Manufaktur
Articles 119 Documents
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Analisis Kualitas Pelayanan Berbasis Preferensi Konsumen: Studi Kasus Pada Bengkel Kendaraan Roda Empat Humiras Hardi Purba; Fransisca Debora; Tosty Maylangi Sitorus; Siti Aisyah; Choesnul Jaqin
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 3, No 2 (2022): Published in December 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v3i2.95

Abstract

Product and service quality factors are important aspects of business continuity. Consumers will abandon low-quality products and services. Consumers will feel satisfied if all aspects of the products and services are appropriately accommodated. Product and service quality have different tendencies because service quality dimensions are more complex than product quality. This study aims to analyze the quality of customer service at auto repair shops based on consumer preferences. Assessment of the level of satisfaction and consumer expectations of each attribute is done by filling out a questionnaire to identify the gap between the level of importance and level of performance. The consumer's assessment of each indicator of the auto repair shop is carried out through a questionnaire filled out to the consumer to find out the gap between the level of importance and the level of performance. The analytical method used is Importance Performance Analysis–IPA showing that the attributes of auto repair shops that need to be improved are [P1] improving the repair period as promised, [P2] Procedures and managerial capabilities in providing adequate service, [P3] Results following consumer recommendations, and [P4] Knowledgeable workshop managers and staff, [P5] Service speed from responsiveness quality dimensions, [P11] Credibility and honesty of workshop managers and staff, [P12] Clarity of communication and information to consumers. The priority of quality attributes of auto repair shops that will be improved can provide alternative development priorities between human resources and limited equipment servicing.
Penilaian Maturity Level Sistem Manajemen Kinerja Pendidikan Tinggi Berdasarkan Critical Success Factors Aulia Sri Dharma Nova; Henmaidi Henmaidi; Dicky Fatrias; Irna Ekawati
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 3, No 2 (2022): Published in December 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v3i2.93

Abstract

Higher education institution is an organization whose role is to produce professional, qualified and competitive human resources. Thus, it is required to be able to implement a good performance management system by building a common understanding of the goals to be achieved and how they can be achieved, as well as the approaches needed to manage and develop resources to improve individual, team and organizational performance. In order to be able to implement a performance management system effectively, adequate initial information is needed to determine the current level of organizational maturity as a basis for further improvement. In this study, a model of the maturity level of a performance management system was developed which was adapted to the form of higher education organization. The results show that the maturity level of the Polytechnic ATI Padang's performance management system is at level three, which means the organization already has clear and integrated policies and guidelines in carrying out its education and management processes followed by the use of up-to-date technology. The development and management of resources have been identified based on needs, as well as the formation of a participatory culture in most work units. Improved technology infrastructure is needed to enable effective use of data and the development of HR skills and knowledge regarding performance management systems so as to increase awareness of the influence of individual performance on the overall performance of the institution.
Penerapan Pengendalian Persediaan Material Dinamit/Expogel Menggunakan Metode Inventori Probabilistik Model Q-Back Order di PT Pindad (Persero) Ifa Saidatuningtyas; Muhammad Alde Rizal; Dhea Tisane Ardhan; Sri Rahayu
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 3, No 2 (2022): Published in December 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v3i2.100

Abstract

PT Pindad (Persero) is in charge of producing commercial military products for the benefit of the government and private sector. However, in its production activities, the company has difficulties in controlling the inventory, one of which is in the dynamite/expo gel component. Stock control using probabilistic inventory method Q-back order model is used to balance between the needs of goods that must be provided and maintain the decrease in sales due to the shortage of goods. This study aims to determine the size of the order lot that minimizes the cost of supplies on the dynamite/expo gel component at PT Pindad (Persero). The optimal order lot size of the calculation result was  with service level of 97.77%. The comparison with company policy showed a decrease in total inventory cost of 0.6% and a decrease in storage costs of 88%.
Analisis Proses Operasional Air Freight Pada Perusahaan Freight Forwarder Menggunakan Value Stream Mapping Fajar Ciputra Daeng Bani; Muhammad Alde Rizal; Firdhani Faujiyah; Trisna Yuniarti
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 4, No 1 (2023): Published in June 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v4i1.103

Abstract

This study aims to provide an overview of the concept of Value Stream Mapping and its significance in process improvement. It highlights the key steps involved in creating a VSM and emphasizes its role in identifying and addressing various types of waste, such as waiting time, unnecessary movement, and rework. By mapping the current state of a process, organizations gain insights into its inefficiencies and areas for improvement. Furthermore, the importance of developing a future state Value Stream Map that outlines the desired state of the process after implementing improvements. It emphasizes the need for continuous monitoring and evaluation to ensure sustained progress and ongoing optimization. Overall, Value Stream Mapping offers organizations a systematic approach to analyze, optimize, and enhance their processes. By visualizing the value flow and identifying opportunities for improvement, businesses can achieve higher levels of efficiency, reduced costs, improved quality, and ultimately deliver greater value to their customers. The calculation and analysis explained that the total processing time was 105.8 minutes and the total lead time was 47 minutes resulting in a non-value added (NVA) of 34 minutes. If the converted into a process percentage form, it is 32% of the total time spent on operational air freight.
Pendekatan Metode ISMO Dalam Menyusun Penjadwalan Perawatan Gearbox dan Rantai Pengangkut Ore Departemen Circular Sintering PT. IRNC Kadex Widhy Wirakusuma; Ari Pranata Primisa Purba; Katon Muhammad
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 4, No 1 (2023): Published in June 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v4i1.110

Abstract

PT. IRNC is a company that operates in the smelter industry. One of the company's production processes is to produce and distribute raw materials in the form of wet Ore into iron and steel products. The distribution of raw materials in this company is continuously ongoing, leading to frequent failures in the functions of the gearbox and the chain of transportation of mineral raw materials. The company has a bustling machine activity but is not associated with the preventive maintenance activities of the machine. One of the activities that can solve the maintenance problem is scheduling preventative maintenance activities and periodic repairs to the gearbox and chain carrier of raw materials. Preventive maintenance is the maintenance activity on the machine which has the purpose of preventing the occurrence of damage, or the maintenance method for the machine planned for the prevention to extend the life of the machine as well as to avoid the failure of function on the machinery that may occur during the production process. This research aims to provide recommendations for scheduled maintenance of the machine with a preventive maintenance approach with the ISMO Method.  The results of the research carried out based on the type of work performed inspection (I) and small repair (S) obtained results respectively for gearbox 13 times inspections (I), and 21 times small repairs (S), while for the chain of transportation of Ore 8 times inspection and four times small reparations, and the number of workers involved 21 people, with the total labor costs of Rp—863,820 million per year.
Pemodelan Biaya Reverse Logistics Pada Pengelolaan Kemasan Minyak Goreng Rahmi Ramadhany; Rika Ampuh Hadiguna; Ahmad Syafruddin Indrapriyatna; Suci Oktri Viarani
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 4, No 1 (2023): Published in June 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v4i1.108

Abstract

Indonesia is listed as the second largest contributor to plastic waste in the world. The problem currently faced is the increasing amount of plastic waste which is one result of the business processes of companies using plastic packaging or plastic packaging manufacturers, one of the plastic packaging waste that comes from cooking oil packaging. The method to solve the problem of processing cooking oil packaging waste carried out in this study is to modify the existing system into a reverse logistics system. Currently, cooking oil companies have not implemented reverse logistics to reduce plastic packaging production. The reverse logistics system applied in this study is to modify cooking oil packages into packages that can be used repeatedly. The reverse logistics system that is applied is then modeled linerly to find out the minimal costs in implementing reverse logistics for the packaged cooking oil. Based on the development of the packaged cooking oil waste management model, it is known that the results of determining the model solution with the linear programming model are the minimal costs for reverse logistics of packaged cooking oil. The model is designed to do a sensitivity analysis by making changes to the reverse logistics cost parameters, changes in the reverse logistics cost parameters resulting in changes to the results that are directly proportional. The designed model is implemented using PT. XYZ which has a similarity with the designed system.
Penentuan Rute Optimal dan Alokasi Kendaraan dalam Pendistribusian Beras di Provinsi Kalimantan Tengah Olyvia Novawanda; Clifton Suharjono; Leonardy Sentosa
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 4, No 1 (2023): Published in June 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v4i1.117

Abstract

Central Kalimantan is one of the most populous provinces in Indonesia where rice has the greatest impact on the calculation of the poverty line. As of August 2022, 0.44 percent of the inflation in Palangkaraya is attributable to rice, which can contribute to an increase in the MPP rate. Margin perdagangan dan pengangkutan (MPP) is a percentage that indicates the increase in rice prices from producers to final consumers, taking into account transportation costs. The objective of this paper is to determine the optimal route and allocation of each vehicle fleet serving each depot, given several constraints using an open-source spreadsheet solver. Vehicle Routing Problem (VRP) is one of the most frequently encountered optimization problems in logistics. In this instance, we optimize the paddy distribution fleet in Central Kalimantan using the VRP method. The results of the data processing led to the choice of the best route that could adhere to all the limitations, demonstrating that the VRP spreadsheet solver could be used for the case in this study. Based on the computations of 13 vehicles, hereinafter referred to as vehicle (V) which serves 100 Customers, it is obtained that V1 will serve 4 Customers, V2 will serve 5 Customers, V3 will serve 26 Customers, V4 will serve 5 Customers, V5 will serve 5 Customers, V6 will serve 6 Customers, V7 serves 3 Customers, V8 serves 4 Customers, V9 serves 14 Customers, V10 serves 5 Customers, V11 serves 3 Customers, V12 serves 11 Customers, and V13 serves 9 Customers.
Analisis Metode Economic Order Quanity Guna Melakukan Efisiensi Persediaan Bahan Baku dan Efisiensi Biaya di Industri Bakery Widya Spalanzani; Panji Sarengat; Rifda Ilahy Rosihan; Erwin Barita Maniur Tambunan
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 4, No 1 (2023): Published in June 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v4i1.115

Abstract

One of the companies in East Bekasi is a company engaged in the bread industry, with the product being sandwiches. The purpose of this research is to perform raw material efficiency and cost savings of raw material inventory. In this study, identified the bread production process for 1 period (3 months). It is known that this company ordered raw materials, namely 2100 kg of flour and 480 kg of granulated sugar. However, in reality, only 1537 kg of wheat flour was used and 379 kg of granulated sugar. There is a difference between ordering raw materials and using raw materials so that the costs incurred in carrying out raw material inventory exceed the limits of the costs that have been determined by the company. The method used is the Economic Order Quantity (EOQ) method. The goal is to control the number of raw material orders made by this company and indirectly to save raw material inventory costs. The findings are comparing calculations by companies using EOQ, the efficiency of raw materials after using the EOQ method for wheat flour is 542 kg and granulated sugar is 93 kg and savings in raw material inventory costs for wheat flour is Rp. 156,437 and granulated sugar is Rp. 212,092.
Redesign User Interface Dengan Metode Design Thinking: Studi Kasus Ni Made Cyntia Utami; Ferdiansyah Pratama Putra Setyawan
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 4, No 2 (2023): Published in December 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v4i2.138

Abstract

Transformation of production and service processes is a form of change in the industrial revolution era that is supported by systems. One of the components in a company's information system is a web page or known as a website. User Interface in website design is a concern at the CV X company which operates in the interior contracting sector. This research aims to redesign the user interface to suit user needs on the CV X website using the design thinking method. The design thinking method has six stages, namely, empathize, define, ideate, prototype, test, and implement. This research carried out four of the six stages of design thinking. Several research results include a collection of companies' desires to change the layout, content and elements on the website, content regarding SVLK, the use of persuasive words, and navigation features in the website footer that are not yet available in the current design. Defining the problem at the define stage is the elimination of be spoke pages, the use of colors that match the characteristics of the company, the addition of interactive animations, and changes to all elements on the website. The results of collecting ideas at the ideate stage were 9 ideas. The realization of ideas at the prototype stage consists of 3 processes, namely the style guideline creation process, the redesign process, and a comparison of the current design with the redesign results. The process of creating a style guideline includes fonts, colors, button elements, website headers and footers. This research focuses on the website user interface only so that the test and implementation stages related to User Experience (UX) are not analyzed.
Pemodelan Dinamis Proses Produksi Batch Satu Tahap Dalam Satu Mesin Dengan Memperhatikan Waktu Loading dan Waktu Proses Petrus Setya Murdapa; Chatarina Dian Indrawati; Theresia Liris Windyaningrum
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 5, No 1 (2024): Published in June 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v5i1.192

Abstract

In the batch process, the company uses the same process facilities to produce various types of products. This allows businesses to change production in response to changes in market demand. Batch processes are widely used in industry. In many cases, batch processes provide several benefits over continuous processes, especially when the industry wants to ensure and maintain the quality standards of its products. This paper proposes a behavioral model of a single-stage batch processing system, using the language of system dynamics. When run, the behavioral model will provide an overview of how the system behaves. The system dynamics language is a formulation of a system of ordinary differential equations that is extracted from the real system being studied, in the form of a stock and flow diagram. The computation of this diagram is further implemented using software. Because it is actually a calculus method, the system dynamics language provides output data much faster than discrete simulation modeling. In this paper, the system behavior modeled is mainly loading, processing and unloading activities. The verification results carried out by testing it on two different case examples show that the model can sufficiently describe the behavior of the conceptual system logically so that the model can enrich experimental tool options related to batch production processes in the future.

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