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Azianti Ismail

Universiti Teknologi Mara, Mechanical Engineering, Faculty Member

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Papers by Azianti Ismail

Approach on Utilizing Customer Usage Profile for ALT Design

Manufacturers would learn important information by collecting and analyzing customer usage profil... more Manufacturers would learn important information by collecting and analyzing customer usage profile of the current component captured in the appropriate usage and environmental stresses. When customer usage profile has been collected, there is assessment of what data is valid and useful, what assumptions need to be made and finally to design suitable accelerated life testing (ALT) for the component. This case study of agricultural tractor transmission provides the basis for ALT designs for the component based upon customer usage measurements which to be conducted to estimate the current reliability of the product. Thus, understanding on the environmental and operating conditions of the components use environment is crucial.

Press Shop Die Handling Investigation Through Simulation

This report has investigated the handling of the dies in a press shop of a major car company and ... more This report has investigated the handling of the dies in a press shop of a major car company and in particular, the utilisation of the die transporter. The activity based simulation method of analysis particularly Extended Control Simulation Language (ECSL) has been applied to investigate the system behaviour in which to obtain solution that maximises the system performance. Activity Cycle Diagram (ACD) has been used as mechanism to both structure the model logic and develop the coding program of the system. A number of operating scenarios has been explored and performance measures such as queuing time, length and resource utilisation have been analysed. The effects of different operating scenarios such short pressing time and high volume dies have presented graphically to show the variation of results in the utilisation ofthe transporter. Hence, based on these analyses, recommended solutions are proposed to optimise the system performance which is the objective of the report. These...

Prognostic and Health Management Trend in Automotive Industry: An Overview

In recent years, Prognostic Health Management (PHM) has caught the attention of lots of researche... more In recent years, Prognostic Health Management (PHM) has caught the attention of lots of researchers in a wide range of applications. Thus, many researchers from research institutes, universities and companies have published and patented their findings in various fields of PHM. PHM is a method or technique that can be used to detect performance degradation and forecast remaining life of a system based on the health monitoring information. A number of review papers discussing on PHM methods and techniques have been presented by other researchers but mostly in maintenance of manufacturing equipments, aerospace systems and structural monitoring. This paper focuses on the trend and direction of PHM especially in the automotive industry through published research papers and also patents. The purpose of this paper is to recognize the trend and to provide suggestions for potential future research in PHM for automotive. Accordingly, this paper should offer opportunity for the manufacturers o...

DFR Process for Brake Pad Reliability Improvement

International Journal of Industrial and Systems Engineering

신제품 개발에 있어서 제품의 잠재적 고장모드를 줄이기 위한 설계 노력은 매우 중요하며 이를 위해서는 체계적이고 혁신적인 신뢰성프로그램을 적용하는 것이 반드시 필요하다. 기업에... more 신제품 개발에 있어서 제품의 잠재적 고장모드를 줄이기 위한 설계 노력은 매우 중요하며 이를 위해서는 체계적이고 혁신적인 신뢰성프로그램을 적용하는 것이 반드시 필요하다. 기업에서 동시공학을 기초로 한 건전한 신뢰성프로그램에 포함된 주요활동으로는 DFR(Design for Reliability), 신뢰성검증 및 물리적 해석활동 등이 있으며, 이 중 DFR은 제품 개발을 지원하는 첫 번째 과학적 신뢰성활동이다. 본 연구는 브레이크패드의 신뢰성을 향상시키기 위하여 회사조직전체에서 여러 부서의 팀 구성원이 유기적으로 참여하는 DFR 프로세스를 조직하고 실행하는 전략과 기술에 대한 연구이다. 본 사례연구의 동기는 해당기업에서 DFR에 적용된 모든 도구와 기술을 통해 제품의 신뢰성을 향상시키고 동시에 글로벌시장의 잠재고객에 대하여 품질과 신뢰성에 대한 확신을 주는데 유용하게 활용하기 위함이다. 본 논문에서는 제품개발주기의 개념설계단계 부터 제품의 폐기까지의 DFR 개념 전개에 대하여 설명하고, 기술적 도구를 적용한 설계초기 단계에서의 분석사례를 제시하였다.

Application of Reliability Growth in coupled with Accelerated Life Test Model

The purpose of this paper is to analyze Accelerated Reliability Growth process data during design... more The purpose of this paper is to analyze Accelerated Reliability Growth process data during design and development on repairable systems. A model has been developed which will compress testing time and also accelerate failure mechanisms therefore rectifying problems more efficiently so that product reliability can be assessed. In addition, time to failure in stress test do not have to be converted to time to failure in normal condition. By applying this model, it targets to save cost through speedier testing time and reducing number of prototypes needed. Therefore, the total life cycle cost of product will be shortened.

Estimation of Equivalent Damage Load for ALT Design

Measurement and analysis of field load data is used to determine the Equivalent Damage Load (EDL)... more Measurement and analysis of field load data is used to determine the Equivalent Damage Load (EDL) that applied to the life of the component. Normal operating conditions values have been obtained through surveys and field visits. The EDL will be applied to design ALT of the component to verify that design requirements are adequate enough for the product to sustain in the current market without any major failures. The case study of tractor transmission is shown in which EDL is determined from field load data that will contribute to closer demonstrating the component life.

Recent Development of Automotive Prognostics

Numerous of publications in Prognostic Health Management (PHM) have been written, published, pres... more Numerous of publications in Prognostic Health Management (PHM) have been written, published, presented and patented by researchers around the globe. Aerospace and military systems, manufacturing equipments and process, structural monitoring, automotive electronics systems and telecommunications are examples of fields that PHM has been implemented. It all started from basic built-in-test, PHM has evolved into more sophisticated and complex systems with advance warning signal of failure detection, prolong system's life, condition-based maintenance forecasting, improving system reliability and availability without compromising the performance and safety. Nowadays, the automotive electronics system has become more advanced and increasingly dependent on accurate sensors and reliable microprocessors to perform vehicle control functions which help to detect faults and to predict the remaining useful life of automotive parts. As the complication of vehicle system's increases, the ne...

International Trend of Functional Safety

Functional safety is about electrical, electronics, and programmable electronic safety-related sy... more Functional safety is about electrical, electronics, and programmable electronic safety-related system which focuses on the potential risk of malfunction in this case the probability and degree of damage to the system. IEC 61508 which was introduced in 2000 has played an important role in functional safety for complex application in electrical, electronics and programmable electronics in a system which failure could have significant impact on the safety of humans and/or the environment. It has become a foundation for international standard safety-related system for airborne systems, railway, nuclear power plants, medical equipment, energy and process systems, machinery, furnaces and automobiles. Recently, automotive industry has been introduced to ISO 26262 which address the complete safety installation from sensor to actuator with its technical as well as management issues. In this paper, the international trends on pre and post introduction of ISO 26262 will be analyzed in which to...

Accelerated Life Test Design for Alternator Magnet

Ferrite magnet is widely used in many automotive components such as motors and alternators. Magne... more Ferrite magnet is widely used in many automotive components such as motors and alternators. Magnets used inside alternators must be in good quality to ensure high level of efficiency could be achieved. Recently, magnet manufacturer has found some hairlines cracks on the sample test. Based on the standard of alternator test (R RS0008:2006), this paper has proposed accelerated failure-free test for alternator to demonstrate that assembled magnet will meet durability objective specified by the magnet manufacturer in which guarantee the target life of magnet with 90 percent reliability and 90 percent confidence level (R90C90). Temperature and rotation speed were selected as accelerated stress factors.

ALT Design using Field Failure and Usage Profile

Initial reliability prediction done by calculation would be more practical if support by evidence... more Initial reliability prediction done by calculation would be more practical if support by evidence from customer usage profile and field failure data to improve the prediction. Thus, the consistency of the design and the product would be practically validated. In this paper, it will address rationale and method to decide on Acceleration Factor (AF) to be used in Accelerated Life Test (ALT) through usage profile and field failure. The case study of tractor transmission is used to demonstrate the method which data obtained from surveys done on farmers, field visits and field failure data from service center. By considering all the elements, it will determine more relevant AF which indicates the real use conditions of the component.

Study of electric vehicle battery reliability improvement

Due to restriction of vehicle emissions and high demand for fossil fuels nowadays, car manufactur... more Due to restriction of vehicle emissions and high demand for fossil fuels nowadays, car manufacturers around the world are looking into alternative ways in introducing new car model that would vastly captured the market. Thus, Electric Vehicle (EV) has been further developed to take the advantage of the current global issues on price of fossil fuels and impact on the environment. Since car battery plays the crucial role on the overall performance of EV, many researchers have been working on improving the component. This paper focused on the reliability of EV battery which involves recognizing failure types, testing method and life prediction method. By focusing on these elements, the reliability feature being identified and as a result the batteries life will be prolonged.

Green Lean TQM Suppliers, Organization and Customers Management Practices in Malaysian Automotive Companies

Applied Mechanics and Materials, 2013

System (SOCM) is a system comprises the interrelated linkages between suppliers; organization and... more System (SOCM) is a system comprises the interrelated linkages between suppliers; organization and customers in Environmental Management System (EMS) practices which are integrated to TQM with Lean Manufacturing (LM) principles. SOCM is essential especially in dealing with inefficient suppliers' chain and customers' management. The ultimate goal of this system is to focus on achieving total SOCM efficiency that uses EMS and Lean TQM System. A survey questionnaire was developed and distributed to 30 highly active automotive companies in Malaysia and the results analyzed by SPSS. The results suggest that the level of EMS SOCM implementation is low among the 1 st tier automotive companies. This shows that LTQM SOCM is more implemented than EMS SOCM among suppliers. Based on the response given, it can be deduced that a high focus and concentration were given to managing suppliers. This is believed due to the LTQM effects on the product quality. It seems that EMS SOCM has no direct impact on the product quality. EMS SOCM mainly caters for the suppliers surrounding rather than that of the customers and final product. The proposed Green LTQM SOCM framework, established in this study based on the results obtained, is believed to offer a preliminary insight on the level of SOCM. Knowing their level, the companies can embark on a new journey to enhance their SOCM. The current proposed framework is a synergy of 4 awards practices and 5 systems. Future study can be conducted to access the status of SOCM in other companies and also extended to other industry.

ISO 26262 automotive functional safety: issues and challenges

Development of Accelerated Failure-free Test Method for Automotive Alternator Magnet

Journal of Society of Korea Industrial and Systems Engineering, 2013

Many automotive components for power generation such as motors and alternators have been widely u... more Many automotive components for power generation such as motors and alternators have been widely using ferrite magnets. To ensure a high level of efficiency could be achieved in an alternator, the assembled magnets must be in good enough durability. Recently, some hairline cracks have been found on the magnet produced by manufacturers in Korea. Thus, there is an increasing concern that some of the magnets produced could cause further problems after being assembled in the alternator. Based on the standard alternator test (RS0008 : 2006), this paper has developed an accelerated failure-free test for magnets in alternator to demonstrate that assembled magnets will meet durability objective specified by the manufacturer. This guarantees the target life of the magnet with 90 percent reliability and 90 percent confidence level (R90C90). Temperature and rotation speed were selected as accelerated stress factors.

Research trends in automotive functional safety

2013 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE), 2013

In recent years, most of the modern automobiles are equipped with embedded electronic systems whi... more In recent years, most of the modern automobiles are equipped with embedded electronic systems which include lots of Electronic Controller Units (ECUs), electronic sensors, signals, bus systems and coding. Due to the complex application in electrical, electronics and programmable electronics, the need to carry out detailed safety analyses which focuses on the potential risk of malfunction is crucial for automotive systems. IEC 61508 has become a foundation for international standard safety-related system for airborne systems, railway, nuclear power plants, medical equipment, energy and process systems, machinery, furnaces and automobiles. The failure of such system could have significant impact on the safety of humans and/or the environment. Thus, ISO 26262 has been introduced in November, 2011 for automotive electrical/electronic (E/E) systems which address the complete safety installation from sensor to actuator with its technical as well as management issues. In this paper, the international trends on pre and post introduction of ISO 26262 will be analyzed in which to see the direction of potential research in this area.

Reliability improvement of brake pads — Case study

2012 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering, 2012

Many varieties of techniques and tools are currently applied in effort to monitor and to improve ... more Many varieties of techniques and tools are currently applied in effort to monitor and to improve the reliability of a product such as field failure data analysis, Quality Function Deployment (QFD), Failure Mode and Effect Analysis (FMEA) and Failure Tree Analysis (FTA). This case study demonstrates the significant of utilizing above tools and techniques in determining the current performance in term of reliability of the brake pads. This information is useful for the manufacturer to convince potential customers in this case which are international car makers to acquire the brake pads based on the reliability monitoring and improvement activities that have been practiced recently. The transition process of implementing these tools and techniques is considered new challenge for the manufacturer to promote their product's marketability to international level.

Investigation of Technological Trends in Automotive Fault Prognostic System

Journal of Society of Korea Industrial and Systems Engineering, 2013

Method of determining acceleration factors for agricultural tractors

2011 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering, 2011

Acceleration factor (AF) is important to determine the proper test time for accelerated life test... more Acceleration factor (AF) is important to determine the proper test time for accelerated life test (ALT). This paper presents the method for determining AF to be used in ALT through duty analysis together with usage profile and field failure data. Usage profile is obtained through surveys from farmers using questionnaires, interviews and field visits. Field failure data is gathered from authorized service centers around South Korea. A case study of tractor transmission is shown with the proposed method.

Approach on Utilizing Customer Usage Profile for ALT Design

Manufacturers would learn important information by collecting and analyzing customer usage profil... more Manufacturers would learn important information by collecting and analyzing customer usage profile of the current component captured in the appropriate usage and environmental stresses. When customer usage profile has been collected, there is assessment of what data is valid and useful, what assumptions need to be made and finally to design suitable accelerated life testing (ALT) for the component. This case study of agricultural tractor transmission provides the basis for ALT designs for the component based upon customer usage measurements which to be conducted to estimate the current reliability of the product. Thus, understanding on the environmental and operating conditions of the components use environment is crucial.

Press Shop Die Handling Investigation Through Simulation

This report has investigated the handling of the dies in a press shop of a major car company and ... more This report has investigated the handling of the dies in a press shop of a major car company and in particular, the utilisation of the die transporter. The activity based simulation method of analysis particularly Extended Control Simulation Language (ECSL) has been applied to investigate the system behaviour in which to obtain solution that maximises the system performance. Activity Cycle Diagram (ACD) has been used as mechanism to both structure the model logic and develop the coding program of the system. A number of operating scenarios has been explored and performance measures such as queuing time, length and resource utilisation have been analysed. The effects of different operating scenarios such short pressing time and high volume dies have presented graphically to show the variation of results in the utilisation ofthe transporter. Hence, based on these analyses, recommended solutions are proposed to optimise the system performance which is the objective of the report. These...

Prognostic and Health Management Trend in Automotive Industry: An Overview

In recent years, Prognostic Health Management (PHM) has caught the attention of lots of researche... more In recent years, Prognostic Health Management (PHM) has caught the attention of lots of researchers in a wide range of applications. Thus, many researchers from research institutes, universities and companies have published and patented their findings in various fields of PHM. PHM is a method or technique that can be used to detect performance degradation and forecast remaining life of a system based on the health monitoring information. A number of review papers discussing on PHM methods and techniques have been presented by other researchers but mostly in maintenance of manufacturing equipments, aerospace systems and structural monitoring. This paper focuses on the trend and direction of PHM especially in the automotive industry through published research papers and also patents. The purpose of this paper is to recognize the trend and to provide suggestions for potential future research in PHM for automotive. Accordingly, this paper should offer opportunity for the manufacturers o...

DFR Process for Brake Pad Reliability Improvement

International Journal of Industrial and Systems Engineering

신제품 개발에 있어서 제품의 잠재적 고장모드를 줄이기 위한 설계 노력은 매우 중요하며 이를 위해서는 체계적이고 혁신적인 신뢰성프로그램을 적용하는 것이 반드시 필요하다. 기업에... more 신제품 개발에 있어서 제품의 잠재적 고장모드를 줄이기 위한 설계 노력은 매우 중요하며 이를 위해서는 체계적이고 혁신적인 신뢰성프로그램을 적용하는 것이 반드시 필요하다. 기업에서 동시공학을 기초로 한 건전한 신뢰성프로그램에 포함된 주요활동으로는 DFR(Design for Reliability), 신뢰성검증 및 물리적 해석활동 등이 있으며, 이 중 DFR은 제품 개발을 지원하는 첫 번째 과학적 신뢰성활동이다. 본 연구는 브레이크패드의 신뢰성을 향상시키기 위하여 회사조직전체에서 여러 부서의 팀 구성원이 유기적으로 참여하는 DFR 프로세스를 조직하고 실행하는 전략과 기술에 대한 연구이다. 본 사례연구의 동기는 해당기업에서 DFR에 적용된 모든 도구와 기술을 통해 제품의 신뢰성을 향상시키고 동시에 글로벌시장의 잠재고객에 대하여 품질과 신뢰성에 대한 확신을 주는데 유용하게 활용하기 위함이다. 본 논문에서는 제품개발주기의 개념설계단계 부터 제품의 폐기까지의 DFR 개념 전개에 대하여 설명하고, 기술적 도구를 적용한 설계초기 단계에서의 분석사례를 제시하였다.

Application of Reliability Growth in coupled with Accelerated Life Test Model

The purpose of this paper is to analyze Accelerated Reliability Growth process data during design... more The purpose of this paper is to analyze Accelerated Reliability Growth process data during design and development on repairable systems. A model has been developed which will compress testing time and also accelerate failure mechanisms therefore rectifying problems more efficiently so that product reliability can be assessed. In addition, time to failure in stress test do not have to be converted to time to failure in normal condition. By applying this model, it targets to save cost through speedier testing time and reducing number of prototypes needed. Therefore, the total life cycle cost of product will be shortened.

Estimation of Equivalent Damage Load for ALT Design

Measurement and analysis of field load data is used to determine the Equivalent Damage Load (EDL)... more Measurement and analysis of field load data is used to determine the Equivalent Damage Load (EDL) that applied to the life of the component. Normal operating conditions values have been obtained through surveys and field visits. The EDL will be applied to design ALT of the component to verify that design requirements are adequate enough for the product to sustain in the current market without any major failures. The case study of tractor transmission is shown in which EDL is determined from field load data that will contribute to closer demonstrating the component life.

Recent Development of Automotive Prognostics

Numerous of publications in Prognostic Health Management (PHM) have been written, published, pres... more Numerous of publications in Prognostic Health Management (PHM) have been written, published, presented and patented by researchers around the globe. Aerospace and military systems, manufacturing equipments and process, structural monitoring, automotive electronics systems and telecommunications are examples of fields that PHM has been implemented. It all started from basic built-in-test, PHM has evolved into more sophisticated and complex systems with advance warning signal of failure detection, prolong system's life, condition-based maintenance forecasting, improving system reliability and availability without compromising the performance and safety. Nowadays, the automotive electronics system has become more advanced and increasingly dependent on accurate sensors and reliable microprocessors to perform vehicle control functions which help to detect faults and to predict the remaining useful life of automotive parts. As the complication of vehicle system's increases, the ne...

International Trend of Functional Safety

Functional safety is about electrical, electronics, and programmable electronic safety-related sy... more Functional safety is about electrical, electronics, and programmable electronic safety-related system which focuses on the potential risk of malfunction in this case the probability and degree of damage to the system. IEC 61508 which was introduced in 2000 has played an important role in functional safety for complex application in electrical, electronics and programmable electronics in a system which failure could have significant impact on the safety of humans and/or the environment. It has become a foundation for international standard safety-related system for airborne systems, railway, nuclear power plants, medical equipment, energy and process systems, machinery, furnaces and automobiles. Recently, automotive industry has been introduced to ISO 26262 which address the complete safety installation from sensor to actuator with its technical as well as management issues. In this paper, the international trends on pre and post introduction of ISO 26262 will be analyzed in which to...

Accelerated Life Test Design for Alternator Magnet

Ferrite magnet is widely used in many automotive components such as motors and alternators. Magne... more Ferrite magnet is widely used in many automotive components such as motors and alternators. Magnets used inside alternators must be in good quality to ensure high level of efficiency could be achieved. Recently, magnet manufacturer has found some hairlines cracks on the sample test. Based on the standard of alternator test (R RS0008:2006), this paper has proposed accelerated failure-free test for alternator to demonstrate that assembled magnet will meet durability objective specified by the magnet manufacturer in which guarantee the target life of magnet with 90 percent reliability and 90 percent confidence level (R90C90). Temperature and rotation speed were selected as accelerated stress factors.

ALT Design using Field Failure and Usage Profile

Initial reliability prediction done by calculation would be more practical if support by evidence... more Initial reliability prediction done by calculation would be more practical if support by evidence from customer usage profile and field failure data to improve the prediction. Thus, the consistency of the design and the product would be practically validated. In this paper, it will address rationale and method to decide on Acceleration Factor (AF) to be used in Accelerated Life Test (ALT) through usage profile and field failure. The case study of tractor transmission is used to demonstrate the method which data obtained from surveys done on farmers, field visits and field failure data from service center. By considering all the elements, it will determine more relevant AF which indicates the real use conditions of the component.

Study of electric vehicle battery reliability improvement

Due to restriction of vehicle emissions and high demand for fossil fuels nowadays, car manufactur... more Due to restriction of vehicle emissions and high demand for fossil fuels nowadays, car manufacturers around the world are looking into alternative ways in introducing new car model that would vastly captured the market. Thus, Electric Vehicle (EV) has been further developed to take the advantage of the current global issues on price of fossil fuels and impact on the environment. Since car battery plays the crucial role on the overall performance of EV, many researchers have been working on improving the component. This paper focused on the reliability of EV battery which involves recognizing failure types, testing method and life prediction method. By focusing on these elements, the reliability feature being identified and as a result the batteries life will be prolonged.

Green Lean TQM Suppliers, Organization and Customers Management Practices in Malaysian Automotive Companies

Applied Mechanics and Materials, 2013

System (SOCM) is a system comprises the interrelated linkages between suppliers; organization and... more System (SOCM) is a system comprises the interrelated linkages between suppliers; organization and customers in Environmental Management System (EMS) practices which are integrated to TQM with Lean Manufacturing (LM) principles. SOCM is essential especially in dealing with inefficient suppliers' chain and customers' management. The ultimate goal of this system is to focus on achieving total SOCM efficiency that uses EMS and Lean TQM System. A survey questionnaire was developed and distributed to 30 highly active automotive companies in Malaysia and the results analyzed by SPSS. The results suggest that the level of EMS SOCM implementation is low among the 1 st tier automotive companies. This shows that LTQM SOCM is more implemented than EMS SOCM among suppliers. Based on the response given, it can be deduced that a high focus and concentration were given to managing suppliers. This is believed due to the LTQM effects on the product quality. It seems that EMS SOCM has no direct impact on the product quality. EMS SOCM mainly caters for the suppliers surrounding rather than that of the customers and final product. The proposed Green LTQM SOCM framework, established in this study based on the results obtained, is believed to offer a preliminary insight on the level of SOCM. Knowing their level, the companies can embark on a new journey to enhance their SOCM. The current proposed framework is a synergy of 4 awards practices and 5 systems. Future study can be conducted to access the status of SOCM in other companies and also extended to other industry.

ISO 26262 automotive functional safety: issues and challenges

Development of Accelerated Failure-free Test Method for Automotive Alternator Magnet

Journal of Society of Korea Industrial and Systems Engineering, 2013

Many automotive components for power generation such as motors and alternators have been widely u... more Many automotive components for power generation such as motors and alternators have been widely using ferrite magnets. To ensure a high level of efficiency could be achieved in an alternator, the assembled magnets must be in good enough durability. Recently, some hairline cracks have been found on the magnet produced by manufacturers in Korea. Thus, there is an increasing concern that some of the magnets produced could cause further problems after being assembled in the alternator. Based on the standard alternator test (RS0008 : 2006), this paper has developed an accelerated failure-free test for magnets in alternator to demonstrate that assembled magnets will meet durability objective specified by the manufacturer. This guarantees the target life of the magnet with 90 percent reliability and 90 percent confidence level (R90C90). Temperature and rotation speed were selected as accelerated stress factors.

Research trends in automotive functional safety

2013 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE), 2013

In recent years, most of the modern automobiles are equipped with embedded electronic systems whi... more In recent years, most of the modern automobiles are equipped with embedded electronic systems which include lots of Electronic Controller Units (ECUs), electronic sensors, signals, bus systems and coding. Due to the complex application in electrical, electronics and programmable electronics, the need to carry out detailed safety analyses which focuses on the potential risk of malfunction is crucial for automotive systems. IEC 61508 has become a foundation for international standard safety-related system for airborne systems, railway, nuclear power plants, medical equipment, energy and process systems, machinery, furnaces and automobiles. The failure of such system could have significant impact on the safety of humans and/or the environment. Thus, ISO 26262 has been introduced in November, 2011 for automotive electrical/electronic (E/E) systems which address the complete safety installation from sensor to actuator with its technical as well as management issues. In this paper, the international trends on pre and post introduction of ISO 26262 will be analyzed in which to see the direction of potential research in this area.

Reliability improvement of brake pads — Case study

2012 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering, 2012

Many varieties of techniques and tools are currently applied in effort to monitor and to improve ... more Many varieties of techniques and tools are currently applied in effort to monitor and to improve the reliability of a product such as field failure data analysis, Quality Function Deployment (QFD), Failure Mode and Effect Analysis (FMEA) and Failure Tree Analysis (FTA). This case study demonstrates the significant of utilizing above tools and techniques in determining the current performance in term of reliability of the brake pads. This information is useful for the manufacturer to convince potential customers in this case which are international car makers to acquire the brake pads based on the reliability monitoring and improvement activities that have been practiced recently. The transition process of implementing these tools and techniques is considered new challenge for the manufacturer to promote their product's marketability to international level.

Investigation of Technological Trends in Automotive Fault Prognostic System

Journal of Society of Korea Industrial and Systems Engineering, 2013

Method of determining acceleration factors for agricultural tractors

2011 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering, 2011

Acceleration factor (AF) is important to determine the proper test time for accelerated life test... more Acceleration factor (AF) is important to determine the proper test time for accelerated life test (ALT). This paper presents the method for determining AF to be used in ALT through duty analysis together with usage profile and field failure data. Usage profile is obtained through surveys from farmers using questionnaires, interviews and field visits. Field failure data is gathered from authorized service centers around South Korea. A case study of tractor transmission is shown with the proposed method.