scholarly journals Enhancing Quality Assurance using Virtual Design Engineering: Case Study of Space Shuttle Challenger

2015 ◽  
Author(s):  
Kouroush Jenab
Keyword(s):  
Quality Assurance ◽  
Space Shuttle ◽  
Design Engineering ◽  
Virtual Design ◽  
Space Shuttle Challenger

scholarly journals System Hazard Platform: Case Study NASA Field Joint Failure

2015 ◽  
Vol 5 (2) ◽  
pp. 9
Author(s):  
Kouroush Jenab ◽  
Josh Herrin ◽  
Saeid Moslehpour ◽  
Sam Khoury
Keyword(s):  
Quality Assurance ◽  
Failure Rate ◽  
Space Shuttle ◽  
Hazard Analysis ◽  
Cold Weather ◽  
Joint Failure ◽  
Space Shuttle Challenger ◽  
Extreme Cold ◽  
Solid Rocket

<p class="1Body">NASA became overconfident with consecutive successful flights with no major failures leading up to Flight 25 of the Space Shuttle Challenger and failed to correctly apply quality assurance to reanalyze the possibilities of failure when extreme cold weather was present for what would become the last Challenger launch. System Hazard Analysis applied correctly to analyze the failure rate patterns of the NASA Space Shuttle Challenger Solid Rocket Booster field joints may have prevented the launch of the tragic Flight 25, where there was a total loss of aircraft and seven astronauts were killed in the accident. The steps of System Hazard Analysis will be explained that if followed may have provided the data necessary for NASA to correct the field joint error prior to instead of after the Challenger explosion.</p>

On the dependability of highly critical non-recoverable space entities with short operation life. Case study of single-use mechanical devices

Dependability ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 3-12
Author(s):  
Yu. P. Pokhabov
Keyword(s):  
Process Engineering ◽  
Small Scale ◽  
Design Engineering ◽  
Scale Production ◽  
Decimal Point ◽  
Engineering Analysis ◽  
Single Use ◽  
Mechanical Devices ◽  
Verification Techniques

Aim. To consider matters of dependability of highly critical non-recoverable space products with short operation life, whose failures are primarily caused by design and process engineering errors, manufacturing defects in the course of single-unit or small-scale production, as well as to define the methodological approach to ensuring the required reliability.Methods. Options were analysed for improving the dependability of entities with short operation life using the case study of single-use mechanical devices and the statistical approaches of the modern dependability theory, special methods of dependability of actuated mechanical assemblies, FMEA, Stage-Gate and ground experiments on single workout equivalents for each type of effect. Results. It was concluded that additional procedures need to be conducted for the purpose of predicting, mitigation and (or) eliminating possible failures as part of the design process using exactly the same approaches that cause failures, i.e., those of design and process engineering. The engineering approaches to dependability are based on early identification of possible causes of failures, which requires a qualified and systemic analysis aimed at identifying the functionality, performance and dependability of an entity, taking into account critical output parameters and probabilistic indicators that affect the performance of the required functions with the allowable probability of failure. The solution is found using a generalized parametric model of operation and design engineering analysis of dependability.Conclusion. For highly critical non-recoverable space entities with short operation life, the reliability requirements should be considered primarily in terms financial, economic, safetyrelated and reputational risks associated with the loss of spacecraft. From a design engineer’s standpoint, the number of nines after the decimal point (rounded to a smaller number of nines for increased confidence) should be seen as the indicator for the application of the appropriate approaches to ensuring the required reliability at the stage of product design. In case of two nines after the decimal point it is quite acceptable to use analytical and experimental verification techniques common to the aerospace industry, i.e., dependability calculations using the statistical methods of the modern dependability theory and performance indicators, FMEA and Stage-Gate, ground experiments on single workout equivalents for each type of effect. As the required number of nines grows, it is advisable to also use early failure prevention methods, one of which is the design engineering analysis of dependability that enables designers to adopt substantiated design solutions on the basis of engineering disciplines and design and process engineering methods of ensuring quality and dependability. The choice of either of the above dependability strategies is determined solely by the developer’s awareness and understanding of potential hazards, which allows managing the risk of potential rare failures or reasonably refusing to do so.

Program Assessment: Equivalency and Credentials for the Global Marketplace

2000 ◽  
Author(s):  
Winfred M. Phillips
Keyword(s):  
Quality Assurance ◽  
Space Shuttle ◽  
Multinational Companies ◽  
Program Assessment ◽  
Engineering Practice ◽  
Sewer System ◽  
Engineering Structures ◽  
Global Marketplace ◽  
At Home

Abstract Great engineering achievements, from the Aqueducts of Rome and Hausman’s Sewer System for Paris to the Boeing 757 and the Space Shuttle, have always benefitted from international influence and content. The reliability of engineering structures and systems has always engendered the confidence of international users. U.S. citizens drive European automobiles with confidence and Europeans drive across U.S. bridges without pause. Today, international content is extensive, often formalized and regulated and a permanent part of tomorrow’s engineering. Engineers both participate in their profession worldwide and evaluate and accommodate international content at home. Multinational companies demand multinational engineering practice. “Credentials without borders” is desired. Accreditation is key to quality assurance.

scholarly journals A Contemporary Case Study Illustrating the Integration of Health Information Technologies into the Organisation and Clinical Practice of Radiation Oncology

2005 ◽  
Vol 34 (4) ◽  
pp. 136-145 ◽  
Author(s):  
Andrew A Miller ◽  
Aaron K Phillips
Keyword(s):  
Information System ◽  
Quality Assurance ◽  
Radiation Oncology ◽  
Information Technologies ◽  
Data Use ◽  
Design Management ◽  
Implementation Cost ◽  
Health Information Technologies ◽  
Local Solutions

The development of software in radiation oncology departments has seen the increase in capability from the Record and Verify software focused on patient safety to a fully-fledged Oncology Information System (OIS). This paper reports on the medical aspects of the implementation of a modern Oncology Information System (IMPAC MultiAccess®, also known as the Siemens LANTIS®) in a New Zealand hospital oncology department. The department was successful in translating paper procedures into electronic procedures, and the report focuses on the changes in approach to organisation and data use that occurred. The difficulties that were faced, which included procedural re-design, management of change, removal of paper, implementation cost, integration with the HIS, quality assurance and datasets, are highlighted along with the local solutions developed to overcome these problems.

Cased-Pipe Sampling for Quality Assurance of Deep Mixing Method: A Case Study

Grouting 2017 ◽  
2017 ◽  
Author(s):  
Ignazio Paolo Marzano ◽  
Massimo Grisolia ◽  
Giuseppe Iorio ◽  
Giuseppe Panetta ◽  
Raffaele Papa
Keyword(s):  
Quality Assurance ◽  
Deep Mixing ◽  
Mixing Method
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