Aulia Ishak

• Lecturer at University of North Sumatra

Extruder pellets were used to convert raw materials in the form of fish meal, fine bran, mocaf flour, and fresh water into pellets or solid granules. Problems arose from the number of components and the high assembly time on the barrel, and the operator lifted the pellet raw material input to the hopper and weighed it separately. The purpose of the...

Dental chair equipment is a crucial component of the dentist's operations when providing the patient with healthcare and is inseparable from dental activity. There have been complaints about how the product's user is inflicting discomfort on the operator during the patient's treatment, which may necessitate improving the device's design in accordan...

Some flower pots are made of plastic materials. Plastic waste is a global environmental issue with varying quantities and types in different countries. One source of plastic pollution is low-durability plastic pots, commonly used for seeding in agriculture, horticulture, and forestry. Waste from these plastic pots is difficult to decompose by soil...

A polymer electrolyte membrane fuel cell (PEMFC) is defined as a type of fuel cell used to generate voltage and current. A fuel cell produces very small amount of electrical energy about 0.7 volts. So, it is essential to stack the fuel cells in bipolar plate series connection for the production of the large amount of electrical energy to fulfil the...

Plantation and forestry systems consist of several dynamic subsystems as well as complexes that are integrated. Plantation and forestry productivity is largely determined by the interactions of each of these sub-systems. Simulation models can illustrate interactions between sub-systems in detail to be analyzed and evaluated in predicting any condit...

The stable natural resources will encourage the productivity of sustainable eucalyptus replanting for the benefit of human life. Replanting eucalyptus plants is one of the things that drive sustainable productivity in eucalyptus processing. Eucalyptus replanting planning requires supporting tool decisions to increase productivity, analyze variabili...

Nowadays, demand of the pulp and paper production increases quickly. That increasing demand has led to demanding of eucalyptus plantation. That is why eucalyptus plantation has rapidly expanded and became the most planted tree species across the world over the last century. Not only because its unique characteristics, increasing of eucalyptus plant...

Eucalyptus is one of the major species used for pulp and paper industry. As industries develop, the need for Eucalyptus supply increases. However, there are challenges plantation companies must specifically determining eucalyptus market price potential risks in eucalyptus plantation and how eucalyptus plantation impacts the surrounding environment....

Changes in supply chain availability in the forestry sector can significantly change efficiency responsiveness. This forestry supply chain network involves various processes such as harvesting, energy generation, wood, paper and board production. Methods that can be used to perform supply chain optimization are hybrid modelling and simulation. Subs...

The forestry and plantation system is an integration of several very complex and dynamic sub-systems. The integration is created due to the interaction of several factors that can affect the productivity of forestry and plantations. The method used in research is to analyze the prior literature that has been selected for discussion and evaluation....

The design of the layout of the production floor facilities in this study aims to solve the problem on the production floor, namely that there is an irregular material flow pattern due to alternating flow and crossing paths with high frequency resulting in total material transfer moment which is directly proportional to high material handling cost....

There are five largest sectors that affected Indonesia’s economic growth in the fourth quarter of 2019, and one of it is plantation. Steps that can be taken to maintain sustainable plantation productivity are replanting activities. This study will discuss various models that have been used in previous studies to represent replanting activities as a...

The development of wood processing industry has made the eucalyptus plantation a promising alternative for its raw materials. This because a potentially valuable of the eucalyptus plantation can be used from the root to the leaves. Therefore, it is deemed necessary to have research and the monitoring approach to evaluate in terms of quantity and qu...

The system of material handling is less systematic becomes a big problem and disrupts the smoothness of the production process that affects the system as a whole. Problems that occur in the company is a workstation that is too dense so that the trajectory of material handling (forklift) becomes narrow, in addition, there are also work stations that...

The product under study is a mattress product. The problem at hand is a mismatch with consumer desires. To minimize this mismatch, an analysis was carried out using the Quality Function Deployment (QFD) and Analytical Network Process (ANP) methods. Where QFD is used to determine customer technical desires and then weighting is carried out using the...

Rapid technological developments require people to use information and communication technology to transact goods/services. Based on a survey by the Central Statistics Agency (BPS), of all data collection efforts, only 15.08% are e-commerce entrepreneurs. This shows that business conducted via the internet in Indonesia is still low. The low utiliza...

PT XYZ is a company engaged in the manufacturing of bedding goods. One of the products from this company that will be the object of research is the pillow. The number of disability pillow products that occurred during 2018 amounted to 21.69%, which could cause a decrease in company productivity and the shift of consumers of these companies to compe...

Production planning has an important role in the company's business processes. A company engaged in the manufacture of intermediate gear parts has a problem in optimizing its production system. The production planning system that occurs is still based on predictions from decision-makers. This study aims to optimize the production planning system to...

Queue is a natural phenomenon that occurs when the demand for a service at a certain time exceeds the capacity of service at the same time. In this paper, the problem is solved using the queuing theory which is an analytical tool that is very helpful in solving queuing problems. This theory includes mathematical studies that produce important infor...

Competition in the industrial world lately is very tight. This intense competition requires companies to be able to compete very well. Companies must be able to provide good quality products that they produce. With the increasing competition, the supply of quality products has become a competitive advantage. Therefore, companies need to adopt compe...

One of the company in industrial product is orange syrup company. The quality of orange syrup can determine the success rate of company. Orange fruits contain acidic pH that can affect syrup quality depending on affecting factors. By using randomized factorial design, which consists of 3 factors, each factor consists of 2 factor levels, sugar conce...

Data mining is the process of manipulating data by extracting information that was previously unknown from a large dataset. The Tree Model in relation to data structures is a data type that simulates a hierarchical tree structure with root values and sub-trees with the parent node represented as a series of recursively defined node links as a means...

The main purpose of quality control is to increase customer satisfaction. PT XYZ is one of the companies engaged in manufacturing by producing bolt product. In terms of quality control, the company is still getting products that increase customer satisfaction and exceed the company’s limits with a defect rate of 13.72%. From the analysis using the...

Calcite-Zincite nano particles were synthesized by Sol-Gel Auto Combustion (SGC) technique. Modifying nanoparticles promote numerous advantages, such as, simplicity of synthesis, small heat for breakdown, regulation above the compound structure, small budget, dependability, repeatability, and moderate synthesis situations. One of interesting study...

Companies must continue to improve service quality in order to face increasingly fierce competition. The design developed by the company must be a design that prioritizes the needs and wants of consumers. The purpose of this literature study is to make an analysis and synthesis of existing knowledge related to the topic to be studied in order to fi...

A wheelchair is a tool used by people who have difficulty walking due to illness, injury or disability. In general, wheelchairs can only be used for sitting and as a tool that helps users move from one place to another. The multifunctional wheelchair that will be designed aims to make it easy for wheelchair users to carry out their activities. This...

PT. XYZ is a company engaged in the rubber processing industry. The production process at XYZ company is wasteful in the form of non-value-added activities. The types of non-value added activities contained in the production process are delays (waiting time), transportation, and defective products. In producing packing sterillizer, the company has...

Company can not be separated from the production process in carrying out its business activities. Therefore, the company strives for the production process to be carried out properly, economically, and to prevent obstacles to the company’s operations. In the production process carried out by AA Company, production operations are the responsibility...

The development of information technology today is very influential in every field of work, especially in Small and Medium Enterprises (SME) which often require the implications of these technologies to support their work. This information technology is expected to help work become faster, more accurate, flexible, and efficient. Kholidi Taylor Conv...

Product design can be done with the initial steps of a systematic approach that is making concept ideas and evaluating them. With the concept, the product design is required to have a concept development, as well as testing of the concept. This research aims to add a multifunctional design to an existing product, a lever for an adjustable chair, an...

The waste produced by the palm oil industry contributes a lot to environmental damage if it is not operated properly. Waste consists 70% of raw material amount which is almost half in the form of liquid. There are many alternatives for treating palm oil industry wastewater, from the most advanced technology to conventional technology. The difficult...

Quality Function Deployment (QFD) is one method for developing customer-oriented products. QFD is a planning process that helps the organization plan to implement various technical support tools effectively and complement each other to prioritize each problem. House of Quality (HOQ) is a tool from QFD that is used to determine design boundaries, sh...

Data Mining is a process that uses statistical, mathematical, artificial intelligence, and machine learning techniques to extract and identify useful information and related knowledge from various large databases. Decision tree is a very interesting classification method that involves the construction of a decision tree consisting of decision nodes...

The global situation consumes enormous amount of energy while the energy sources are limited and decreasing. Alternative energy source is widely focused for compensating the main energy source. Thus, the finding of alternative resources particularly biomass energy is highly essential. Biomass gasification is a transforming process of solid biomass...

PT. Semen Padang is a company that produces cement. In producing cement, of course we need a master production schedule to plan and produce outputs related to quantity and time periods. In other words, the master production schedule is a plan that identifies the quantity of certain items made by a company. The subject studied in this case was PT Se...

Data on Average Room Occupancy Rate of Hotels by Province in 2013-2017 obtained from the Central Statistics Agency. The Average Data of Hotel Room Occupancy Rate by Province in 2013-2017 is continuous data. This data will be tested using 4 types of continuous distribution data, normal, exponential, lognormal, and gamma distribution. This data proce...

Clinic X is one of the health clinics that located in Medan, which provides public health and social security facilities. Based on preliminary observations and generally applicable in some health clinics in Medan, there is a high arrival of inpatients at certain times, resulting in a large number of service queues. After being observed several time...

Quality is a dynamic condition related to products, services, people, processes and the environment that satisfy or exceeds expectations. Quality is the main factor for consumers in choosing products. The quality of products by company determine based on certain sizes and characteristics. XYZ company is a company engaged in Baja Lembaran Lapis Seng...

Kansei is a Japanese word that means consumers’ feelings and psychological imagery about new products. Kansei Engineering aims to produce new products based on the feelings and demands of consumers. Quality Function Deployment can be defined as a mechanism or process for determining customer requirements which are further translated into technical...

The aim of this work is to evaluate the dry turning ability of zirconia toughened alumina reinforced with 5 wt.% CeO 2 and 0.7 wt.% La 2 O 3 (ZTA5Ce0.7La) ceramics as cutting insert in turning of 2379 steel with hardness of 43 HRC. Triangular cutting inserts were fabricated using this material composition via powder metallurgy route. Results of the...

Along with the current era of globalization and advancements of sophisticated technology, high quality products at competitive prices will be chosen by consumers. This will increase sales of the product, which means increasing market share so that it will increase company revenue. In production activities, problems are always found that ultimately...

The rise of new and qualified karaoke venues is a place that many people often visit. In this journal, the family karaoke to be analyzed for comparison is K2 family Karaoke, NAV family karaoke, and Milo Family Karaoke. In the process of data processing, the method used is the method of Analytical Hierarchy Process (AHP) with Super Decisions Softwar...

The rapid development of the times directly demands technology, culture and social development as well. The development of this era also gives us many problems that must be resolved. One of the problems that must be faced is the problem of making decisions. There are many methods for solving decision-making problems, one of which is Multiple-Criter...

The therapeutic hot pillow is a blend of science and ancient health techniques concoction that are Able to cure various ailments and maintain the body. Heat therapy can open blood vessels wider, thus increasing blood flow and supply of oxygen and nutrients to reduce pain in joints, muscles, and ligaments. Warm temperatures can also reduce the poten...

The quality of a factory is not only determined by the level of expertise of workers owned, quality facilities and supporting infrastructure is also determined by the queuing system that occurs during the production process. If the input and output on the machines are not balanced will cause the accumulation of goodsand allows the material used is...

PT. Pamapersada Nusantara was established as a company engaged in the coal mining contracting business which was later also trusted to work on gold, quarry, limestone, clinker, dam construction and road construction. Many problems that occur at PT. Pamapersada Nusantara TCMM District, which are: Factory layout and irregular flow patterns, technolog...

Quality in the manufacturing industry besides emphasize on the products produced, also need to be considered quality in the production process. Thus, the final product is defect free and there is no more waste to be paid handsomely because the product must discarded or reworked. PT. “X” is a company in the form of a Limited Liability Company in Del...

The process of production affects the quality of the products produced. Related to this, good quality control is needed to improve product quality. This quality control can be done by improving methods or production processes that reduce product quality. PT. QRS is one of the companies engaged in the manufacturing of zinc coated steel sheets. The p...

This research was conducted to design a standart static bicycle for post-stroke patients using Quality Function Deployment method combined Analytic Hierachy Process, Value engineering, and Brainstorming model. The product was designed from strong metal material, portable, by considering the strength to withstand the load, ergonomic aspects, and the...

Decision Support Systems can be used as problem solving in semi-structured and unstructured conditions. Multi-criteria decision making tools can be solved by the Analytical Hierarchy Process method. The problem that will be examined in this study is about the services of household appliances in the city of XYZ. The household appliance services that...

Economic growth, technology and social culture has driven changes in consumer behavior and needs that continue to grow, one of which is the need to continue to improve themselves. This is supported by the number of beauty clinics that stand. As a company engaged in the field of suits, beauty clinics must be able to make consumers feel satisfied wit...

The use of a backpack that is not appropriate has a significant negative impact on users. These negative effects can cause back pain and changes in body posture. Many students who carry backpacks on their backs exceed 10% of the total body weight. Therefore, an innovative backpack product, Anti Overload Bag. This bag is equipped with sensors and al...

Quality control is carried out in order to produce products in the form of goods or services in accordance with the standards desired and planned. PT. XYZ is a manufacturing company that produces chopsticks made from bamboo. In producing chopstick products, PT. XYZ is experiencing waste problem, which is the number of defective products. The percen...

The waste produced by the palm oil industry contributes greatly to environmental damage if it is not operated properly. Waste from palm oil processing consists of 70% of the amount of raw material which is almost half in the form of liquid. Over time the growth of the palm oil industry has always increased, therefore the waste from the palm oil ind...

In the era of rapid technological development, people use information and communication technology to buy and / or sell goods and / or services via the internet. Based on a survey conducted by the Central Statistics Agency (BPS), it shows that of all data collection efforts, only 15.08% were e-commerce businesses. This shows that the business done...

Business competition requires companies to be able to implement strategic plans to meet consumer needs in product development by improving quality, performance, and reducing costs and production time. PT.X is a bookshelf manufacturing company that continues to strive to meet the needs of consumers with quality products. The problem that occurs in t...

With the development of technology and times, we have faced various alternative problems. The problem of making decisions is one of the problems that is often encountered in everyday life. In the matter of decision-making, there are several methods that can be used, one of which is Multi-Criteria Decision Making (MCDM). MCDM is a method to make dec...

This company is a company engaged in wood processing. The product produced by this company is wooden pallets. The problems that are found by this company is waste in the production process that are the high defective producs and non value added activities The average disability percentage of wood pallets is 7.52% of the total production per month....

UD. XYZ is a private company engaged in the convection and computer embroidery industry. This company uses raw materials in the form of fabrics to make various kinds of products such as t-shirts, shirts, training pants, jackets, emblems and various types of clothing. Problems that are being faced by this company is a cross-movement, low efficiency,...

Evaluation and improvement of production performance are things that must be considered in an effort to maintain and improve the quality of production results. One level in measuring production performance is smooth production. Good risk management can support and maintain the smooth production process in the company. This research was conducted at...

The Massage Cap is a device to massage the acupuncture points on the user’s head. This Massage Cap has the additional function of the eye patch as an additional. In the process of making the Massage Cap product using the Nigel Cross approach where the brainstorming technique is first used to determine the characteristics of the product to be made,...

In today’s industrial age, many are discovering goods and services to meet the needs of life and activities. Human creativity is required to maintain the fulfillment of life’s requirements in various fields to increase customer satisfaction. To overcome these problems, a study of customer satisfaction using the quality function deployment (QFD) met...

Process planning is about bridging design to manufacturing in an effective way. Although many methods can be used to recognize CAD and manufacturing feature, one way to do it is by Graph-based Method. Attributed Adjacency Graph (AAG) is develop for each feature of a part model in this case to ease of planning the machining of the part. Each machini...

The aim of this paper is to investigate the influence of stacking sequence of multi layered woven bamboo and glass fibers reinforced with epoxy matrix composites under static tensile and tension-tension fatigue loading. Six layers of bamboo fiber and seven layers of glass fiber has been used to prepare the samples by hand lay-up technique with [0°/...

Eucalyptus is a plant that has a very beneficial value to the environment such as can reduce the risk of forest fires, be efficient in water use, nature became more natural, restore land degradation or unproductive land, and the growth of these plants has a sustainable potential for biodiversity. Therefore, the need to replant eucalyptus in order t...

Many methods, rules, and techniques are used by some manufacturing companies to enhance product competitiveness by fulfilling customer needs and satisfaction possible by improving product design quality. Many researchers suggest a variety of design tools that were implemented early in the design process. Quality function deployment and Analytical h...

Hirarki AHP adalah sarana terstruktur untuk memodelkan keputusan yang ada. Ini terdiri dari tujuan keseluruhan, sekelompok opsi atau alternatif untuk mencapai tujuan, dan sekelompok faktor atau kriteria yang menghubungkan alternatif dengan tujuan. Kriteria selanjutnya dapat dipecah menjadi subkriteria dan sebagainya, dalam level sebanyak yang diper...

Spare parts are goods that consist of several components that form a single unit and have certain functions. The development of the number of motorized vehicles in Indonesia from 2012-2017 has always increased, with a growth rate of 31.88%. The selection of the right supplier is not only profitable for the company but also can increase customer sat...

The process of sending and loading finished goods is very important. According to some experts, transportation activities spend 44% of the total cost. Even in Indonesia transportation costs can reach more than 60%. In practice, one way of saving on transportation costs can be done by minimizing the waiting time for loading finished products in the...

In this case, the company Crude Palm Oil (CPO) is still not able to produce palm oil that meets the specifications that can be seen from the free fatty acid content reaches 3.51%. This can affect the quality of the products to be able to compete with a competitor. Therefore, this study aims to conduct quality control of Crude Palm Oil (CPO), to ana...

New renewable energy assessment on power plants is one of the solutions that can be developed in order to increase the utilization of new renewable energy as a source of electrical energy in electricity generation and also to realize national energy security. Before conducting a new renewable energy assessment on a power plant, the steps that must...

Spare parts are goods that consist of several components that form a single unit and have certain functions. To facilitate companies in selecting suppliers, a supplier selection model is needed to make it easier for companies to select suppliers and make it easier to see strategic directions to take several criteria from suppliers to achieve priori...

Liquid waste generated from the production process of large rubber plantations reaches approximately 26.4 m3 / ton dry rubber. The high liquid waste is because water is the most resources needed during the production process. This waste can cause adverse effects on the environment if not managed properlySeveral liquid waste treatment technologies h...

At present competition among manufacturing companies is increasing. Therefore manufacturing companies need to improve product quality and develop quality management processes to develop new product designs and product designs. The methods that can be used in improving the quality of the product are QFD and Value Engineering. The implementation of Q...

Changes in consumer lifestyles result in companies having to compete to be able to create new products that are more creative and varied to support their place in the market. The design that must be developed by the company is a design that is oriented towards the wants and needs of consumers. There are many methods of product development, one of w...

Acrylonitrile-butadiene-styrene (ABS) is one of the most widely used plastic. The application of ABS increases rapidly in industries recently. The drawback of the increasing demand of ABS is the increment of ABS waste. Huge increment in ABS waste has led to the increasing of environmental pollution. The demand in green technology and sustainability...

Solid waste is known as waste, which it recommends is often undesirable because it has no economic value. One of the factors that affect the amount of waste is the amount or population density. The high population has caused the amount of waste to be higher. The waste management system in the landfill (TPA) is open transportation, so that it can in...

PT. Energi Sejahtera Mas (ESM), merupakan perusahaan yang bergerak dalam hal produsen oleochemical yang berlokasi di Dumai, Riau, Indonesia. Pada PT. Energi Sejahtera Mas terutama pada area Water Treatment Plant (WTP) tingkat kebisingan yang diakibatkan oleh mesin adalah berkisar 80 dB - 100 dB. Kebisingan dapat menyebabkan terjadinya hearing loss...

Abstract. Solid waste is known as waste, which it recommends is often undesirable because it has no economic value. One of the factors that affect the amount of waste is the amount or population density. The high population has caused the amount of waste to be higher. The waste management system in the landfill (TPA) is open transportation, so that...

PT. Energi Sejahtera Mas (ESM), merupakan perusahaan yang bergerak dalam hal produsen oleochemical yang berlokasi di Dumai, Riau, Indonesia. Pada PT. Energi Sejahtera Mas terutama pada area Water Treatment Plant (WTP) tingkat kebisingan yang diakibatkan oleh mesin adalah berkisar 80 dB - 100 dB. Kebisingan dapat menyebabkan terjadinya hearing loss...

Every year the development of the palm oil industry continuously. Crude palm oil (CPO) and palm kernel oil (PKO) are processed in the palm oil industry. Comparison of the amount of oil produced with the product produced is 30% of the raw material, so that 70% of the processed oil will be solid or liquid waste. The development of the palm oil indust...

Currently, manufacturing industry competes in improving the quality of products produced, High demand leads to competition in similar manufacturing industries. Therefore, it becomes a challenge for companies to reduce product abnormality. Six sigma is a very early and potential ideology in this field. In production sector accross the world, six sig...

The Crude Palm Oil (CPO) processing industry in Indonesia has growth rapidly. Currently, Indonesia is capable to produce 41.98 million tons of palm oil from 14.03 million hectares land area, with an average selling price for 714.3 US dollars per metric ton. The problems faced by PT. XYZ was CPO production capacity below than the optimal CPO product...