Engine Failure Experience Improves the Product

2002 ◽  
Author(s):  
Stephen G. Dexter ◽  
Michael W. Rasser
Keyword(s):  
Stress Field ◽  
Design Process ◽  
Great Care ◽  
Critical Question ◽  
Effect Analysis ◽  
Root Cause ◽  
Risk Of Injury ◽  
Engine Failure ◽  
The Cost ◽  
Failure Experience

There are the inevitable occasions when something goes wrong despite the great care taken when engines are designed, built, operated and serviced. Failures can lead at best to some cost and inconvenience or at the worst to a totally destroyed engine. The cost of repairs, followed sometimes by many weeks of down time, can be enormous. In addition there is the critical question of safety and the risk of injury to personnel. By analyzing failures and their causes a lot of experience can be gained and used to the benefit of all. This experience can improve future products. The paper describes some failures which have been experienced by the authors and shows how an analysis of the evidence has identified the root cause. We show how the knowledge gained improves our ability to predict engine behavior and the stress field in the components concerned. The paper goes on to describe what measures can be taken to improve the product and to prevent the circumstances from happening again. The use of Failure Mode and Effect Analysis (FMEA) is described because experience gained from failures can make this an extremely powerful tool when used during the design process.

Case Study—Failure Analysis of a Multiplexer

2016 ◽  
Author(s):  
Michael Woo ◽  
Marcos Campos ◽  
Luigi Aranda
Keyword(s):  
Failure Analysis ◽  
High Reliability ◽  
Component Failure ◽  
Root Cause ◽  
Knowing That ◽  
Cause Of Failure ◽  
The Cost

Abstract A component failure has the potential to significantly impact the cost, manufacturing schedule, and/or the perceived reliability of a system, especially if the root cause of the failure is not known. A failure analysis is often key to mitigating the effects of a componentlevel failure to a customer or a system; minimizing schedule slips, minimizing related accrued costs to the customer, and allowing for the completion of the system with confidence that the reliability of the product had not been compromised. This case study will show how a detailed and systemic failure analysis was able to determine the exact cause of failure of a multiplexer in a high-reliability system, which allowed the manufacturer to confidently proceed with production knowing that the failure was not a systemic issue, but rather that it was a random “one time” event.

Bringing Ergonomics to the Design of a Behavioural Care Unit

2000 ◽  
Vol 44 (8) ◽  
pp. 8-11
Author(s):  
Jacqueline B. Barnett
Keyword(s):  
Design Process ◽  
Iterative Process ◽  
User Needs ◽  
Work Processes ◽  
Team Members ◽  
Early Design ◽  
Design Changes ◽  
Final Design ◽  
The Individual ◽  
The Cost

The application of ergonomics is important when considering the built environment. In order to create an environment where form follows function, a detailed understanding of the tasks performed by the individuals who will live and work in the facility is required. Early involvement in the project is key to maximizing the benefit of ergonomics. At Sunnybrook and Women's College Health Sciences Centre in Toronto, Canada, this early intervention was embraced during the design process of a behavioural care unit for aggressive patients. The ergonomist was involved in three phases of design; user needs analysis, block schematics and detailed design. The user needs and characteristics were established using a combination of focus groups, interviews, direct observation, task analysis and critique of current working environments. The challenge was to present the information to the design team in a useful manner. The format chosen was a modification of Userfit (Poulson 1996) that outlined the various characteristics of the patient group and the design consequences with “what does this mean for me” statements. During the block schematics phase an iterative design process was used to ensure that the ergonomic principles and the user needs were incorporated into the design. Ergonomic input was used in determining the room sizes and layout and to ensure work processes were considered. Simple mock-ups and anthropometric data assisted in illustrating the need for design changes. Examples that highlight the areas of greatest impact of ergonomic intervention include the patient bathrooms, showers and tub room. Significant changes were made to the design to improve the safety of the work and living space of the end users. One of the greatest challenges was having an appreciation for the individual goals of the team members. Ensuring there was adequate space for equipment and staff often resulted in recommendations for increased space. This in turn would increase the cost of the project. The architect and, later in the project, the engineer had goals of bringing the project in on budget. The final design was very much a team effort and truly die result of an iterative process. The sum of the individual contributions could not match the combined efforts. It was only through the ergonomic contributions in this early design phase that the needs of the staff, patients and families could be so well represented. The success of the iterative process provides the foundation for bringing ergonomics considerations into the early design stages of future projects.

Production System Improvement by Integration of FMEA with 5-Whys Analysis

2013 ◽  
Vol 748 ◽  
pp. 1203-1207 ◽  
Author(s):  
Siew Hong Ding ◽  
Nur Amalina Muhammad ◽  
Nur Hanisah Zulkurnaini ◽  
Amanina Nadia Khaider ◽  
Shahru Kamaruddin
Keyword(s):  
Failure Mode ◽  
Rapid Growth ◽  
Production System ◽  
Lower Cost ◽  
Semiconductor Industry ◽  
Drilling Machine ◽  
Effect Analysis ◽  
Marketing Environment ◽  
Root Cause ◽  
System Improvement

With the rapid growth of semiconductor industry, manufacturers are always seeking for improvement to produce better product quality with lower cost in order to survive under competitive marketing environment. However, these matters are easily affected by the failures occurred on the machines. Thus, this paper proposes framework using failure mode and effect analysis (FMEA) with 5-Whys analysis to discover the root cause of the failure furthermore to identify the effective solutions. Drilling machine has been used to justify the practicability of the proposed framework.

The Effect Analysis of Fin Arrangement on Thermal Hydraulic Performance of a Vehicular Cooler

2013 ◽  
Vol 712-715 ◽  
pp. 1600-1604
Author(s):  
Jing Zhao ◽  
Bao Lan Xiao ◽  
Wei Ming Wu ◽  
Xiao Li Yu ◽  
Guo Dong Lu
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Fluid Flow ◽  
Design Process ◽  
Simulation Method ◽  
Effect Analysis ◽  
Performance Requirements ◽  
Flow And Heat Transfer ◽  
Stability Structure ◽  
Safety And Stability

The excellent thermal hydraulic performances of coolers are the foundations of vehicular safety and stability. Structure, material, fin type and arrangement all have important effects on the thermal hydraulic performances. Numerical simulation method was adopted in this paper to investigate the effect of fin arrangement. The fluid flow and heat transfer performances were contrasted and analyzed under two different fin arrangements. It was found that fin arrangement effected thermal hydraulic performances severely and during the design process of a cooler, the performance requirements could be met through adjusting fin arrangements.

scholarly journals Observational Study of Medication Error in Outpatient Pharmacy RSUP Dr. Hasan Sadikin Bandung

2017 ◽  
Vol 15 (2) ◽  
pp. 210
Author(s):  
Viki Hestiarini ◽  
Lia Amalia ◽  
Eni Margayani
Keyword(s):  
Medication Error ◽  
Medication Errors ◽  
Drug Information ◽  
Data Entry ◽  
Care Process ◽  
Analysis Method ◽  
Risk Priority Number ◽  
Effect Analysis ◽  
Root Cause ◽  
Cause Of Failure

Medication error can occur at all stages, starting from prescribing, dispensing and administration of drugs. This study aims to assess the medication errors that occur in the pharmaceutical care process and analyze the cause of failure using the root cause analysis method, to improvement action and decrease the incidence of medication errors. The data were completeness prescription, frequency of dispensing error and completeness of drug information. The number of sample was 1100 prescriptions Prescribing errors were found the potential injury 15.69±11.51% and near missed error 0.5±0.55%. At dispensing stage, occur 427 incidences (9.71%), consist of two incidences (0.04%) for validation assessment regulations, 224 incidences (5.09%) of data entry, 113 incidences (2.57%) of retrieval of drugs, 19 incidences (0.43%) of fi ll in drugs, 69 incidences (1.57%) of fi nal check. At dispensing stage, near missed 330 incidences (7.51%) of near missed and 97 incidences (2.21%) of potential injury. Failure mode and effect analysis calculate of risk priority number, the drug retrieval (RPN 210) and data entry (RPN 126) were analyzed root cause of the analysis for man, material, method, facility and environment.

The Context of Inconclusive Elections and the Implications for Democratic Consolidation in Nigeria

2021 ◽  
Vol 2 (2) ◽  
Author(s):  
Saheed Owonikoko ◽  
Kelvin Ashindorbe
Keyword(s):  
Content Analysis ◽  
Democratic Consolidation ◽  
General Election ◽  
Electoral Process ◽  
Financial Cost ◽  
Root Cause ◽  
General Elections ◽  
The Cost ◽  
Electoral Law

This paper examines the phenomenon of inconclusive elections witnessed in the polity since 2011 but with increased frequency since 2015, a development that has put the electoral management body on the spot light. Since the conclusion of the 2015 General elections, there have been seven off-cycle governorship elections, three of these elections in Kogi, Bayelsa and Osun state were initially declared inconclusive. In the 2019 General Election, six governorship contest in Adamawa, Bauchi, Benue, Kano, Plateau and Sokoto were determined inconclusive, this is beside the stalemate in River state. Does the increase in inconclusive elections signal progress or regression in the electoral process? What role has the ‘margin of lead’ principle and other factors such as violence play in the increased number of inconclusive elections in 2019? What are the cost and implications of the widespread nature of inconclusive elections for democratic consolidation? This paper interrogates these questions against a backdrop of mercantilist politics and a rentier economy and contends that the root cause of increased inconclusive elections is traceable to the inordinate ambitions of political gladiators and their desperation to win at all cost that is fueled by the prebendal character of the Nigerian state.  The paper concludes that impersonal application of the electoral law and guidelines can only enhance the integrity of the electoral process and strengthen democracy regardless of the associated social and financial cost of inconclusive elections. The methodology is qualitative in approach, data was analysed using the thematic and content analysis style.   

scholarly journals A Methodology for the Application of Virtual Evaluation Methods within the Design Process of Cold Forged Steel Pinions

2019 ◽  
Vol 1 (1) ◽  
pp. 3451-3460 ◽  
Author(s):  
Andreas Rohrmoser ◽  
Björn Heling ◽  
Benjamin Schleich ◽  
Christoph Kiener ◽  
Hinnerk Hagenah ◽  
...  
Keyword(s):  
Service Life ◽  
Design Process ◽  
Evaluation Methods ◽  
Cold Forging ◽  
Machining Processes ◽  
Short Service Life ◽  
Productive Process ◽  
Machine Elements ◽  
The Cost ◽  
Operational Behaviour

AbstractGears are essential machine elements in the drivetrain and transmission technology. The operational behaviour of a gear pairing is influenced by the design of the gear kinematics as well as the component properties. With regard to an improvement of performance and service life, the targeted modification of tooth geometry and component properties offers a promising approach. Thus, the achievable geometric and mechanical component properties are influenced by the manufacturing process, which must be taken into account in the design process. The application of virtual evaluation methods is suitable for this purpose. For the manufacturing of steel gears, cold forging provides the potential of achieving beneficial mechanical properties in a highly productive process. Major challenges for the industrial application are the short service life of the cost- intensive tools and the low geometric accuracy in comparison to machining processes. Within this study the design of the tooth geometry as well as the associated forming tool are investigated. The aim is to derive recommendations regarding an optimization of the resulting component properties and operational behaviour.

World Gas Supplies for the Future: Questions and Answers

1993 ◽  
Vol 11 (6) ◽  
pp. 540-568 ◽  
Author(s):  
B. Tissot ◽  
M. Valais
Keyword(s):  
Natural Gas ◽  
Fossil Fuels ◽  
Economic Viability ◽  
Critical Question ◽  
Gas Industry ◽  
Political Issues ◽  
The Future ◽  
Questions And Answers ◽  
The Cost ◽  
Substantial Rise

The abundance of the worldwide resources of natural gas and its qualities as a “clean” fuel make it a major energy option for the future. However, the increasing distance of resources in relation to the major consuming zones should bring about a considerable development of international gas trade and also a very substantial rise in the cost of future supplies to major markets. Will these markets accept a new scale of value for natural gas in relation to other fossil fuels in order to ensure the economic viability of the formidable investments required in the coming decades is the most critical question of the gas industry, among many other technical, economic and political issues.

Proposing a Practical Method for Conceptual Design Process in New Product Development: Medical Glasses as a Case Study

2014 ◽  
Vol 3 (2) ◽  
pp. 80
Author(s):  
Amir Mirzadeh Phirouzabadi
Keyword(s):  
Product Development ◽  
Conceptual Design ◽  
New Product Development ◽  
Design Process ◽  
Quality Function Deployment ◽  
Early Stage ◽  
New Product ◽  
Practical Method ◽  
Effect Analysis ◽  
Quality Of Products

Nowadays,improving the quality of products, reducing cost and meeting customer’srequirements are necessary to shorten the time of new product development(NPD). NPD is used to describe the complete process of bringing a new product to market and conceptual design process(CDP) is at its early stage and has mostly changed from passive respond toaggressive one. Thus, this study proposed a practical method for CDP in NPDthrough three phases as Converting customers’ requirements to product specifications,Generating and selecting of concepts and Testing and finalizing the concepts byusing some different management-engineering techniques. Firstly, this papertried to prioritize customer’s requirements related to product by AHP (AnalyticHierarchy Process) and convert them to engineering parameters of TRIZ (Theoryof Inventive Problem Solving) in order to define the inventive principals.Next, based on QFD (Quality Function Deployment), we measured the weight valuesof inventive principals. Finally, as FMEA (Failure Mode and Effect Analysis)can analyze the weight values and reduce the sequential risk, then finalconceptual design was generated. At the end, a medical glasses was used as acase study of innovative design to validate the method and explain how thestrategies of this research for CDP.

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