Incoming Quality Control Research Articles

The Impact of Quality Control Implementation on Productivity and Product Quality in Industry

Furniture production is one of the activities that has the potential to generate income for educational institutions. The furniture production process is generally carried out by experienced students utilizing industry-standard facilities, namely the Wood Construction workshop along with its machinery equipment. Therefore, the implementation of Quality Control in the production process is necessary. This study aims to determine the impact of Quality Control implementation on improving the productivity and quality of furniture products. The method used is quantitative with 4 stages of Quality Control, including product design, process planning, Incoming Quality Control (IQC), and In-Process Quality Control (IPQC). Productivity measurement is divided into 3 parts: partial productivity, total factor productivity, and total productivity, which includes labor productivity, time, and production output. Meanwhile, product quality measurement is obtained from assessments by practitioners and product quality testing according to ISO 19682. Data is processed using the path analysis method with the help of a smart PLS application. The research results show that the productivity of production output is 87.5%, categorized as good, with labor productivity of 0.125 pieces/person/day and work hour productivity of 0.25 pieces/hour/day. Product quality based on production processes is categorized as good at 83%. Meanwhile, product quality testing, including visual aspects is good (82.3%), product stability (normal), strength (normal), durability (normal), stiffness (normal 34mm/m), and drop test (normal). Based on path analysis, it is known that quality control including product design, process planning, Incoming Quality Control (IQC), and In-Process Quality Control (IPQC) has an impact on improving the productivity and quality of furniture products. the quality control carried out to increase productivity and product quality can be said to be good with the validation of the final result of 0.188 including in the good category.

Estimation of the repeatability and reproducibility of test results in determining the degree of cure of protective paint coatings using differential scanning calorimetry

The degree of curing of protective paint-and-varnish coatings for oil country tubular goods is a parameter characterizing the completeness of their polymerization, and allows drawing a conclusion about the final physicomechanical properties and the possibility of using the material under specific conditions. This parameter is considered decisive in conducting acceptance tests and incoming quality control of pipe products with plated protective epoxy coatings despite a low accuracy of the obtained results and the impact of various instrumental factors and methodological approaches. The authors have developed a methodology for determining the curing degree of coatings based on the procedures given in regulatory documents (CSA Z245.20 Series-18, GOST R ISO 21809-2), taking into account the analysis of factors affecting the results of determining the curing degree carried out in the previous work. According to the conducted studies, the rates of heating and cooling during the measurement process, the temperature test program (in particular, the presence and duration of isothermal exposures before heating cycles), and curve processing methods were corrected and selected in the proposed methodology. The aim of this work is the analysis of the precision of the developed method for determining the curing degree of protective coatings to confirm the high accuracy of the obtained values under observing the prescribed procedure. The analysis was carried out by statistical processing of the results obtained in comparative tests performed in four testing laboratories, and included calculation of the repeatability of the results by their standard deviation, reproducibility and assessment of the acceptability of these parameters. The developed procedure for determining the curing degree of protective coatings, from sampling to processing of DSC curves, showed good precision, which indicates the reproducibility and repeatability of the proposed method. The developed method can be used as a unified sequence for determining the curing degree of paints and varnishes used as protective coatings in different laboratories.

Applying Machine Learning to Construct a Printed Circuit Board Gold Finger Defect Detection System

Machine vision systems use industrial cameras’ digital sensors to collect images and use computers for image pre-processing, analysis, and the measurements of various features to make decisions. With increasing capacity and quality demands in the electronic industry, incoming quality control (IQC) standards are becoming more and more stringent. The industry’s incoming quality control is mainly based on manual sampling. Although it saves time and costs, the miss rate is still high. This study aimed to establish an automatic defect detection system that could quickly identify defects in the gold finger on printed circuit boards (PCBs) according to the manufacturer’s standard. In the general training iteration process of deep learning, parameters required for image processing and deductive reasoning operations are automatically updated. In this study, we discussed and compared the object detection networks of the YOLOv3 (You Only Look Once, Version 3) and Faster Region-Based Convolutional Neural Network (Faster R-CNN) algorithms. The results showed that the defect classification detection model, established based on the YOLOv3 network architecture, could identify defects with an accuracy of 95%. Therefore, the IQC sampling inspection was changed to a full inspection, and the surface mount technology (SMT) full inspection station was canceled to reduce the need for inspection personnel.

Controlled germination of grain crops is an effective way to processing low-quality raw materials

Relevance. The development of technologies of cereal crops germination and obtaining of raw ingredients with increased antioxidant properties, containing in their composition biologically active substances of natural origin, will allow to form a modern domestic market of useful food products to maintain the health of the country in the long term. One such approach could be controlled germination of grain crops by ultrasonic treatment during the soaking stage. This technology will maximise the yield of finished products per unit of processed raw material, process low-quality raw materials and create products with increased nutritional value.Methods. The objects of the study were three samples of grain crops: wheat, barley, oats. At the initial stage, incoming quality control of raw materials and their disinfection by physical method of exposure were carried out. For experimental samples of cereal crops at the stage of soaking the impact of ultrasound (22 ± 1.25 kHz) 245 W/l for 5 min, then the grain was soaked for 8 hours (wheat grain) and 12 hours (barley and oats grain), the process of germination was carried out until reaching the sprout size 1.5–2 mm in more than 90% of grains. All operations with control samples were performed in the same sequence, excluding the process of ultrasound exposure. The total content of flavonoids and polyphenolic compounds was determined in all tested samples using spectrophotometric method, total antioxidant activity using DPPH-method, and γ-aminobutyric acid content using automated liquid chromatography system.Results. The studies showed that all germinated samples of cereal crops are characterized by sufficiently high values of flavonoid and polyphenolic compounds. At the same time, the samples obtained by ultrasound exposure showed an increase in the content of flavonoids by an average of 7.3–8.9 times, polyphenols by 2–5.6 times. In the process of intensified controlled germination, the total antioxidant activity increased by 31.6–40.0%, relative to the control samples of grain crops. The increase in GABA content in samples after ultrasound exposure averaged 360–490%. The results confirmed the possibility and feasibility of using the proposed technology of controlled germination in obtaining raw ingredients from germinated cereal crops. The study was carried out with the financial support of the Russian Science Foundation Grant 23-26-00290.

Standardness of antimicrobial discs by various manufacturers in the light of import substitution.

In connection with the introduction of economic sanctions against the Russian Federation by the United States, the European Union, Japan, and a number of other countries, import substitution is becoming one of the strategic objectives of the Russian economy The comparative assessment of standardness and effectiveness of six antimicrobial commercial producer-varying disks for clinical and test strains of microorganisms has been conducted. It is based on analyzing of the variation coefficient (Cv) of inhibition zone diameters, mean values, and diameter values ranges, which are indicators of reproducibility, accuracy and efficiency, respectively. Discs from BD BBL result in insignificant variations of inhibition zone diameters, providing accurate and reproducible data. Imported discs available on the national market from a friendly country produced by HiMedia Company are showed more variation and inferior in quality to BD BBL ones. There are satisfactory results for some domestic discs, but discs with imipenem, meropenem, ciprofloxacin and gentamicin are not standard enough to assure reproducible results. To have reliable data on antibiotic susceptibility of infectious agents, incoming and routine quality control of antimicrobial disks is needed as a compulsory procedure for every bacteriological laboratory.

ВХІДНИЙ КОНТРОЛЬ СПОЖИВЧИХ ВЛАСТИВОСТЕЙ ТРАКТОРІВ НА ВТОРИННОМУ РИНКУ УКРАЇНИ

Abstract Purpose of the study. The purpose of the work is to increase the efficiency of the use of secondary market tractors due to the improvement of the technological process of their input control. In order to achieve the set goal, the following tasks were solved: the methodological foundations of the incoming quality control of tractors on the secondary market were justified; the proposed algorithm of the technological process of the input quality control of the tractor on the secondary market with the determination of the main functional, ergonomic and traction-energy indicators was implemented in practice. Research methods. Materials and initial data for research became the basis of qualitative assessment of tractors, taking into account the specific features of the development of the secondary market of tractors. Research methods consisted in studying, analyzing, comparing, summarizing and evaluating data regarding the results of determining the consumer properties of tractors under their operating conditions. The results of the study. The secondary market of tractors in Ukraine is in the stage of formation, during which it is evaluated, first of all, their efficiency, which characterizes not only the ability to work (perform the necessary functions), but also to comply with regulatory and technical and design documentation. Currently, used general-purpose tractors of the «KhTZ-170», «MTZ-80» and «John Deere» series 8R tractors are sold in Ukraine, during the purchase of which their operability is predicted in the presence of damage that manifests itself in a violation of the tractor’s serviceability while preserving its operability. Based on the results of research and the experience of other countries, the need to introduce a separate legal act in Ukraine, which would regulate the requirements and procedures for assessing compliance for single samples used, as well as independently assembled is substantiated. Conclusion. An important direction of improving the technical equipment of the agricultural sector of Ukraine, as well as the loading of repair and other agricultural service enterprises, is the development and effective functioning of the secondary market of tractors and agricultural machines, which will allow speeding up and improving the quantitative and qualitative composition of the machine-tractor fleet. At the same time, one of the main elements in the system of improving the quality of agricultural machinery is the proper organization of incoming control of these products on the secondary market. The issue of commissioning (registration) of tractors purchased on the secondary market is currently not finally settled in Ukraine and requires the development of a separate legal act. Key words: tractor, consumer properties, secondary market, input control, measuring equipment, performance forecasting, and tractor registration.

EVALUATION OF IMPLEMENTATION OF INVENTORY CHECK PROCEDURE IN PT. TECTRON MANUFACTURING

This study report discusses the Evaluation of the Implementation of Inventory Checking Procedures In PT. Tectron Manufacturing. This study report focuses on discussing the inventory checking procedures carried out by IQC (incoming quality control). The background of this writing is that rejected items are often found in the production line, this happens because of the lack of awareness of employees to check according to the established procedures and the lack of accuracy in the checking process due to inadequate IQC checking areas so that when performing visual checks it becomes looks unclear due to dim lighting. The purpose of this study is to improve employee performance in preventing irregularities when checking incoming goods inventory. The research method used by the author is descriptive method and the data collection method is carried out by means of observation, interviews and document inspection. The results of this study indicate that the level of employee compliance at PT. Tectron Manufacturing on the procedure for checking incoming goods inventory has not been effective or it can be said that employees at PT. Tectron Manufacturing has not fully carried out its duties based on the procedures that have been established in the company.

Spare parts supply with incoming quality control and inspection errors in condition based maintenance

The upcoming industrial revolution 4.0 built on the internet of things, and prescriptive analytics paves the way for the spread of continuously monitored condition-based maintenance (CBM) in the industry. In the CBM implementations, it is essential to consider the impact of spare parts quality, lead-time, and inspection errors on maintenance cost and system availability. We propose a new maintenance model that incorporates the effects of these features in addition to the different cost factors, e.g., replacement cost, holding cost, and shortage cost. In a case study, we optimize our model by deciding on the degradation level at which a spare part is ordered. We show that a proper inspection of spare parts pays back up to 22% in maintenance cost savings as the spare parts' quality deteriorates. The vendor mean lead-time, the offered spare part price, and the mean degradation per time unit significantly impact the optimal maintenance cost. Finally, the costly detection processes of defective items installed in the system due to inspection errors have a limited cost reduction.

Penerapan Lean Manufacturing Dengan Metode Value Stream Mapping Untuk Mengurangi Waste Pada Proses Pengecekan Material Bahan Baku Ke Lini Produksi

PT. Brigth Mobile Telemunnication is a manufacturing company that produces mobile phones, one of which is OPPO and REALME brand mobile phones. In fulfilling its production needs, PT Brigth Mobile Telecommunication works with suppliers in Indonesia. The delivery process at pt Brigth mobile telecommunications involves two divisions, namely the IQC division and the warehouse division. before sending the material must be checked first at the IQC division to prevent quality problems in the production line but delays in the delivery of raw material materials to the production line often occur due to the ineffectiveness of the checking process due to activities that do not provide added value which is a source of waste. Then the Value Stream Mapping Tools are used to identify and eliminate the waste. The purpose of this study was to determine the initial conditions of the company, as well as the final conditions after repairs using kaizen. From the research conducted, it was found that several wastes in the checking process include Transportation, Unappropriate processing (inappropriate process), Unnecessary motion (unnecessary movement)-waiting (waiting). And the result after the repair is done is the reduced time to complete the material checking process by combining several SOP and replacing the Acceptable Quality Level AQL 1 standard with the AQL S-3 standard to make it more effective because it is rare to find NG.Keywords: incoming quality control, checking process, Value Stream Mapping Tools, Waste, AQL (Acceptable Quality Level)

STATISTICAL ANALYSIS OF "KIROVETS" TRACTOR FAILURES IN THE NOVOSIBIRSK REGION

For ensuring of the efficient operation of tractors in agriculture, there is a need of the information on failures of aggregates and systems. In the agricultural production of Russia, serial tractors are operated in various production and climatic conditions, the specifics of failures in specific regions are of particular interest. Kirovets tractors are the most common in the agro- industrial complex of the Novosibirsk region. (Research purpose) The research purpose is to collect and analyze statistical data on failures of Kirovets tractors operated in agricultural production in the Novosibirsk region. (Materials and methods) Failures of Kirovets tractors were logged at the place of appearance and operating time of the tractor for three years. The sample consists of 129 tractors. The data obtained were processed by mathematical statistics methods. (Results and discussion) Forty one percent of failures occur in the operating time interval of up to 500 moto-hours. The maximum number of failures accounted for the chassis, 37 percent, and transmission units, 32 percent. Forty six percent of failures are caused by violation of operating rules, 8 by climatic factors, 46 percent by insufficient quality of the tractor itself. (Conclusions) The article describes a certain specificity of failures of the studied tractors in the conditions of the Novosibirsk region. The main reason for failures is the low quality of assembly and the use of substandard materials in production. The article recommends for improving of the reliability of the Kirovets tractor to develop proposals to adjust the frequency and content of maintenance, taking into account regional specifics. The manufacturer needs to pay more attention to the quality control of the assemblies and components and the incoming quality control of materials used in the production of the tractor.

METHODOLOGICAL APPROACHES TO CREATING AN EFFECTIVE SYSTEM OF INCOMING CONTROL AND PROCUREMENT MANAGEMENT

A key component of the quality management system is the incoming quality control of raw materials, materials and components. The course of the further production process and the quality of manufactured products depend on the correctness of its implementation, the accuracy of compliance with all the necessary procedures. Another important aspect that is inextricably linked with incoming inspection is working with suppliers. In order to minimize costs and increase the effectiveness of actions, it is necessary to establish a stable and well-coordinated work on the supply of raw materials, materials and components. To accomplish this task, the enterprise must develop and approve a methodology for evaluating suppliers, which allows them to conduct a comprehensive analysis, choose the most reliable suppliers with a proven reputation and high performance. The research base is a machine-building enterprise – public joint-stock company “NEFAZ” (PJSC “NEFAZ”). The article identifies problem areas and suggests methods for their improvement. Based on the results of the study, a comprehensive methodology for assessing suppliers has been developed, which makes it possible to determine the rating of the supplier and, depending on this, to establish the type of incoming control. Possible types of effect from the introduction of this technique at the enterprise are considered.

Magneto-inductive systems as a method to reduce the environmental risks of the existing systems of incoming quality control of metallurgical raw materials

The advantages of automated systems for magnetic inductive incoming quality control of raw materials of large metallurgical enterprises are demonstrated. Environmental risks under the existing visual control system were assessed.

Incoming data quality control in high-resolution urban climate simulations: a Hong Kong–Shenzhen area urban climate simulation as a case study using the WRF/Noah LSM/SLUCM model (Version 3.7.1)

Abstract. The growth of computational power unleashed the potential of high-resolution urban climate simulations using limited-area models in recent years. This trend empowered us to deepen our understanding of urban-scale climatology with much finer spatial–temporal details. However, these high-resolution models would also be particularly sensitive to model uncertainties, especially in urbanizing cities where natural surface texture is changed artificially into impervious surfaces with extreme rapidity. These artificial changes always lead to dramatic changes in the land surface process. While models capturing detailed meteorological processes are being refined continuously, the input data quality has been the primary source of biases in modeling results but has received inadequate attention. To address this issue, we first examine the quality of the incoming static data in two cities in China, i.e., Shenzhen and Hong Kong SAR, provided by the WRF ARW model, a widely applied state-of-the-art mesoscale numerical weather simulation model. Shenzhen has gone through an unprecedented urbanization process in the past 30 years, and Hong Kong SAR is another well-urbanized city. A significant proportion of the incoming data is outdated, highlighting the necessity of conducting incoming data quality control in the region of Shenzhen and Hong Kong SAR. Therefore, we proposed a sophisticated methodology to develop a high-resolution land surface dataset in this region. We conducted urban climate simulations in this region using both the developed land surface dataset and the original dataset utilizing the WRF ARW model coupled with Noah LSM/SLUCM and evaluated the performance of modeling results. The performance of modeling results using the developed high-resolution urban land surface datasets is significantly improved compared to modeling results using the original land surface dataset in this region. This result demonstrates the necessity and effectiveness of the proposed methodology. Our results provide evidence of the effects of incoming land surface data quality on the accuracy of high-resolution urban climate simulations and emphasize the importance of the incoming data quality control.

To the problem of the natural environment quality in the oil storage and transshipment facilities zones of influence

The oil storage and transhipment are usually located outside the boundaries of settlements, often on agricultural lands. Environmental pollution will inevitably have a negative impact on land productivity and products quality. The study deals with the problem of atmospheric air and soil quality in the impact zones of objects of storage and oil reloading. It is established that the quality of atmospheric air and soil in the zones of influence of such facilities does not meet the environmental legislation requirements. The main sources of environmental pollution are: the reservoirs of raw materials and final products, pumping station pumps and place of the final product loading in automotive, rail tank cars and other containers. The priority pollutants include hydrogen sulfide, phenol, benzene, ethylbenzene, toluene, xylenes, mercaptans, saturated hydrocarbons C1-C5 and C6-C10. It is established that the greatest threat of the environment pollution is: the imported product low quality; a legacy hardware design of the petroleum products storage and handling, improper waste management. Economic subjects recommended to organize the incoming quality control of oil confirmation of compliance of its members with supporting documents. In terms of improving the hardware design of the technological process is proposed: application of loopback vapors during road tankers discharge, creating a covered loading with an oil overload from storage tanks to rail tank cars, the use of nitrogen cushions or pontoons in oil storage, the use of modern technologies of storage and/or disposal of oil sludge liquidation and sludge pits recultivation.

Non-destructive quality control methods in additive manufacturing: a survey

PurposeIn recent years, additive manufacturing (AM) technology has been acknowledged as an efficient method for producing geometrical complex objects with a wide range of applications. However, dimensional inaccuracies and presence of defects hinder the broad adaption of AM procedures. These factors arouse concerns regarding the quality of the products produced with AM and the utilization of quality control (QC) techniques constitutes a must to further support this emerging technology. This paper aims to assist researchers to obtain a clear sight of what are the trends and what has been inspected so far concerning non-destructive testing (NDT) QC methods in AM.Design/methodology/approachIn this paper, a survey on research advances on non-destructive QC procedures used in AM technology has been conducted. The paper is organized as follows: Section 2 discusses the existing NDT methods applied for the examination of the feedstock material, i.e. incoming quality control (IQC). Section 3 outlines the inspection methods for in situ QC, while Section 4 presents the methods of NDT applied after the manufacturing process i.e. outgoing QC methods. In Section 5, statistical QC methods used in AM technologies are documented. Future trends and challenges are included in Section 6 and conclusions are drawn in Section 7.FindingsThe primary scope of the study is to present the available and reliable NDT methods applied in every AM technology and all stages of the process. Most of the developed techniques so far are concentrated mainly in the inspection of the manufactured part during and post the AM process, compared to prior to the procedure. Moreover, material extrusion, direct energy deposition and powder bed processes are the focal points of the research in NDT methods applied in AM.Originality/valueThis literature review paper is the first to collect the latest and the most compatible techniques to evaluate the quality of parts produced by the main AM processes prior, during and after the manufacturing procedure.

Conceptual Model in Improving Internal Performance of a Company

The purpose of this research to analyze the effect of Internal Supply Chain that influences the Company Operational Performance at PT. AST Indonesia Semarang. Quantitative method was use in this study and the instrument were using Structural Equation Model (SEM). The study involved 100 employees as the questionnaire respondents from 600 employee population that related with internal supply chain such as purchasing, production, incoming quality control, and material preparation. Simple random sampling was use at the quantitative research with proportional quantity of respondent that have taken in every department depend on total employee in each department. By using the result of data analysis, the research conclusion will be the basis for making policy suggestions on implications for the company as well as managerial implications although variables or indicators may find a bad or insignificant influence on the performance of PT. AST Indonesia. This study is expected to provide suggestions for improvements to strengthen the variables or indicators that will be important points that must be monitored and controlled by PT. AST Indonesia to achieve good performance.

Газохроматографическое определение свободных сахаров в изолятах соевого белка

Разработана методика газохроматографического определения свободных сахаров (глюкоза, сахароза, раффиноза, стахиоза) с применением внутреннего стандарта – трикаприна. Для установления коэффициентов чувствительности использовали стандарты сахаров глюкозы, сахарозы, раффинозы и стахиозы компании SigmaAldrich в совокупности с расчетным методом. Результаты исследования представляют интерес в области аналитического контроля производства продуктов переработки сои, в частности, изолятов соевого белка.

Quality control issues in 3D-printing manufacturing: a review

PurposeThis study aims to investigate issues of quality and quality control (QC) in three-dimensional (3D) printing by reviewing past work and current practices. Possible future developments are also discussed.Design/methodology/approachAfter a discussion of the major quality dimensions of 3D-printed objects, the applications of some QC techniques at various stages of the product life cycle (including product design, process planning, incoming QC, in-process QC and outgoing QC) are introduced.FindingsThe application of QC techniques to 3D printing is not uncommon. Some techniques (e.g. cause-and-effect analysis) have been applied extensively; others, such as design of experiments, have not been used accurately and completely and therefore cannot optimize quality. Taguchi’s method and control charts can enhance the quality of 3D-printed objects; however, these techniques require repetitive experimentation, which may not fit the work flow of 3D printing.Originality/valueBecause quality issues may discourage customers from buying 3D-printed products, enhancing 3D printing quality is imperative. In addition, 3D printing can be used to manufacture diverse products with a reduced investment in machines, tools, assembly and materials. Production economics issues can be addressed by successfully implementing QC.

Mechanical and Acoustic Characteristics of the Weld and the Base Metal Machine Part of Career Transport

Currently, many industries use foreign-made machinery. There is no opportunity to purchase quality original spare parts for which machinery. Therefore, enterprises operating this equipment are looking for producers of analogues of various parts and assemblies. Quite often, the metal of such analog components turns out to be substandard, which leads to their breakdown at a much earlier date and the enterprises incur material losses.Due to the fact that the complex of performance characteristics and the resource of products are laid at the stage of their production, it is extremely important to control the quality of the raw materials. The structure, mechanical, acoustic and magnetic characteristics of metal samples of such destroyed details of quarry transport as hydraulic cylinders and detail “axis” of an excavator are investigated. A significant spread of data on the chemical composition of metal, hardness and characteristics of non-destructive testing is established, which gives grounds to recommend to manufacturers and suppliers of parts is more responsible to approach the incoming quality control. The results of the investigation of metal samples by destructive and non-destructive methods of control are compared, which showed that the spectral-acoustic method of nondestructive testing can be used to control the quality of the responsible machine parts under conditions of import substitution.

Investigation of impurities detected in X-ray inspection of MPG-7 fine-grained graphite blanks and details

The purpose of the research was to study the structure of MPG-7 fine-grained graphite by X-ray inspection and scanning electron microscope investigation methods. We carried out a structural and local chemical analysis of inhomogeneities occurring in graphite blanks. According to the data obtained, we changed technical documentation for the incoming quality control of MPG-7 graphite blanks and details.