Total System Intervention for System Failure

2013 ◽  
pp. 193-213
Author(s):  
Takafumi Nakamura ◽  
Kyoich Kijima
Keyword(s):  
Information And Communication Technologies ◽  
Total System ◽  
System Failure ◽  
Critical System ◽  
System Failures ◽  
System Intervention ◽  
Actual Application ◽  
Preventative Measures ◽  
Subsequent Discussion ◽  
Total System Intervention

In this paper, total system intervention for system failure (TSI for SF) is proposed for preventing further occurrences of system failures. TSI is a critical system practice for managing complex and differing viewpoints. First, the authors introduce meta-methodology called “system of system failures” (SOSF) as a common language among various stakeholders to improve their understanding of system failures. The actual application scenario is proposed: “TSI for SF.” The SOSF and related methodologies are used in the course of the subsequent discussion and debate to agree on who is responsible for the failure and identify the preventative measures to be applied. An application example in information and communication technologies engineering demonstrates that using the proposed “TSI for SF” helps prevent future system failures by learning from previous system failures. Three actions are identified for preventing further system failures: closing the gap between the stakeholders, introducing absolute goals, and enlarging system boundary.

Total System Intervention for System Failure

2011 ◽  
Vol 2 (3) ◽  
pp. 42-62
Author(s):  
Takafumi Nakamura ◽  
Kyoich Kijima
Keyword(s):  
Information And Communication Technologies ◽  
Total System ◽  
System Failure ◽  
Critical System ◽  
System Failures ◽  
System Intervention ◽  
Actual Application ◽  
Preventative Measures ◽  
Future System ◽  
Total System Intervention

In this paper, total system intervention for system failure (TSI for SF) is proposed for preventing further occurrences of system failures. TSI is a critical system practice for managing complex and differing viewpoints. First, the authors introduce meta-methodology called “system of system failures” (SOSF) as a common language among various stakeholders to improve their understanding of system failures. The actual application scenario is proposed: “TSI for SF.” The SOSF and related methodologies are used in the course of the subsequent discussion and debate to agree on who is responsible for the failure and identify the preventative measures to be applied. An application example in information and communication technologies engineering demonstrates that using the proposed “TSI for SF” helps prevent future system failures by learning from previous system failures. Three actions are identified for preventing further system failures: closing the gap between the stakeholders, introducing absolute goals, and enlarging system boundary.

Marketing System Failure: Revisioning Layton’s Marketing System Model

2020 ◽  
pp. 027614672096145
Author(s):  
Janine Williams ◽  
Janet Davey ◽  
Micael-Lee Johnstone
Keyword(s):  
System Failure ◽  
Marketing System ◽  
System Failures ◽  
Systems Perspective ◽  
Self Organized ◽  
Critical Junctures ◽  
Marketing Systems ◽  
Conceptual Paper ◽  
Path Dependent

The purpose of this conceptual paper is to examine the mechanisms of long term marketing system failure from a path dependent, marketing systems perspective in order to identify ways of avoiding such situations in future. Using the model of Layton and Duffy (2018) we critically analyze the current plastic packaging crisis and its evolution over time. Through examining the mechanisms of failure from a systems perspective, we extend the path dependent, marketing system evolution model and advance understanding of marketing system failures. As a result of this analysis, the paper provides five propositions regarding where failure occurs within the system and identifies critical junctures where intervention (self-organized stakeholder initiatives and/or public policy intervention) can facilitate desirable outcomes in the future.

A general formula for the downtime distribution of a parallel system

1996 ◽  
Vol 33 (03) ◽  
pp. 772-785
Author(s):  
Harald Haukås ◽  
Terje Aven
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Time Distribution ◽  
Life Time ◽  
Exact Formula ◽  
Parallel System ◽  
System Failure ◽  
System Failures ◽  
Failure Scenario ◽  
Common Situation

In this paper we study the problem of computing the downtime distribution of a parallel system comprising stochastically identical components. It is assumed that the components are independent, with an exponential life-time distribution and an arbitrary repair time distribution. An exact formula is established for the distribution of the system downtime given a specific type of system failure scenario. It is shown by performing a Monte Carlo simulation that the portion of the system failures that occur as described by this scenario is close to one when we consider a system with quite available components, the most common situation in practice. Thus we can use the established formula as an approximation of the downtime distribution given system failure. The formula is compared with standard Markov expressions. Some possible extensions of the formula are presented.

A general formula for the downtime distribution of a parallel system

1996 ◽  
Vol 33 (3) ◽  
pp. 772-785 ◽  
Author(s):  
Harald Haukås ◽  
Terje Aven
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Time Distribution ◽  
Life Time ◽  
Exact Formula ◽  
Parallel System ◽  
System Failure ◽  
System Failures ◽  
Failure Scenario ◽  
Common Situation

In this paper we study the problem of computing the downtime distribution of a parallel system comprising stochastically identical components. It is assumed that the components are independent, with an exponential life-time distribution and an arbitrary repair time distribution. An exact formula is established for the distribution of the system downtime given a specific type of system failure scenario. It is shown by performing a Monte Carlo simulation that the portion of the system failures that occur as described by this scenario is close to one when we consider a system with quite available components, the most common situation in practice. Thus we can use the established formula as an approximation of the downtime distribution given system failure. The formula is compared with standard Markov expressions. Some possible extensions of the formula are presented.

Diagnostic Modeling and Diagnosability Evaluation of Mechanical Systems

1996 ◽  
Vol 118 (3) ◽  
pp. 425-431 ◽  
Author(s):  
G. E. Clark ◽  
R. K. Paasch
Keyword(s):  
Failure Modes ◽  
Mechanical Systems ◽  
Diagnostic Model ◽  
System Failure ◽  
System Failures ◽  
Maintenance Time ◽  
Increase Product Quality ◽  
Reliability Methods ◽  
Air Control ◽  
Diagnostic Modeling

Consideration of diagnosability in product design promises to increase product quality by reducing maintenance time without increasing cost or decreasing reliability. Methods for investigating the diagnosability of mechanical and electro-mechanical systems are described and are applied to the Bleed Air Control System (BACS) on the Boeing 747-400. The BACS is described and a diagnostic model is developed using information from the system Failure Modes and Effects Analysis. Emphasis is placed on the relationships between the system’s functions and its components. Two metrics for the evaluation of system diagnosability and two metrics for the evaluation of component diagnosability are defined. These metrics emphasize diagnostic ambiguity and are combined with the probability of different system failures to weight the effects of each failure. Three modified systems are produced by reassigning functions from one component to another. The resulting effects on the system and component diagnosability are evaluated. We show that by changing these relationships system diagnosability can be improved without adding sensors or other components.

scholarly journals Investigation of Lockout / Tagout Procedure Failure in Machine Maintenance Process

2019 ◽  
Vol 20 (2) ◽  
pp. 135
Author(s):  
Luciana Triani Dewi
Keyword(s):  
System Failure ◽  
Job Description ◽  
Cause Analysis ◽  
System Failures ◽  
Machine Maintenance ◽  
Analysis Technique ◽  
Electricity Power ◽  
Maintenance Activities ◽  
Supervisor Evaluation ◽  
Maintenance Process

Lockout/tag out (LOTO) refers to specific practices and procedures to stop the release of hazardous energy and turnoff machinery and equipment during service or maintenance activities. An effective LOTO system will ensure the workers are protected from the unexpected conditions during maintenance activities. This paper focus on incidents of LOTO system failures in an electricity power industry. LOTO system had implemented for many years in the company, but many incidents of LOTO system failure was still happened. The purpose of the research was to investigate the cases of incident caused by LOTO procedure failures. The research was conducted using descriptive analytical approach to analyse the cases of incident to find the root causes and develop the solution. Main data used in the research was document of incidents and was analysed by Systematic Cause Analysis Technique (SCAT). The result of investigation showed the root causes of LOTO system failure were caused by individual, job and management factors. Based on SCAT chart synthesis, the control actions were identified. The identified control movement were improve operational procedure of LOTO and proposed job description of supervisor. Evaluation of control action concluded that basically the suggestions were feasible to implement and some adjustments were needed due to implementation.

On Piping Vibration Screening Criteria

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Nikola Jacimovic ◽  
Fabio D'Agaro
Keyword(s):  
Engineering Practice ◽  
Total System ◽  
System Failure ◽  
Screening Criteria ◽  
Literature Research ◽  
Short Time

Abstract Vibration-related issues are common in the engineering practice. Piping vibrations can range from those barely noticeable to the ones which result in total system failure in a very short time . This paper presents a synthesis of the criteria which should be used to estimate the severity of vibrations based on both exhaustive literature research and the authors' experience accumulated over the years of engineering practice.

scholarly journals Takeover Safety Analysis with Driver Monitoring Systems and Driver-Vehicle Interfaces in Highly Automated Vehicles

2021 ◽  
Vol 11 (15) ◽  
pp. 6685
Author(s):  
Dongyeon Yu ◽  
Chanho Park ◽  
Hoseung Choi ◽  
Donggyu Kim ◽  
Sung-Ho Hwang
Keyword(s):  
Monitoring System ◽  
Autonomous Vehicles ◽  
Autonomous Driving ◽  
Clear Correlation ◽  
Total System ◽  
System Failure ◽  
Automated Driving ◽  
Minimum Risk ◽  
Human In The Loop ◽  
Driver Monitoring

According to SAE J3016, autonomous driving can be divided into six levels, and partially automated driving is possible from level three up. A partially or highly automated vehicle can encounter situations involving total system failure. Here, we studied a strategy for safe takeover in such situations. A human-in-the-loop simulator, driver-vehicle interface, and driver monitoring system were developed, and takeover experiments were performed using various driving scenarios and realistic autonomous driving situations. The experiments allowed us to draw the following conclusions. The visual–auditory–haptic complex alarm effectively delivered warnings and had a clear correlation with the user’s subjective preferences. There were scenario types in which the system had to immediately enter minimum risk maneuvers or emergency maneuvers without requesting takeover. Lastly, the risk of accidents can be reduced by the driver monitoring system that prevents the driver from being completely immersed in non-driving-related tasks. We proposed a safe takeover strategy from these results, which provides meaningful guidance for the development of autonomous vehicles. Considering the subjective questionnaire evaluations of users, it is expected to improve the acceptance of autonomous vehicles and increase the adoption of autonomous vehicles.

scholarly journals Analysis of a Human-Machine Interface for Cooperative Truck Overtaking Maneuvers on Freeways: Increase Success Rate and Assess Driving Behavior during System Failures

2021 ◽  
Vol 5 (11) ◽  
pp. 69
Author(s):  
Jana Fank ◽  
Christian Knies ◽  
Frank Diermeyer
Keyword(s):  
Success Rate ◽  
Driving Simulator ◽  
Road Traffic ◽  
Human Machine Interface ◽  
Truck Drivers ◽  
System Failure ◽  
System Failures ◽  
Road Users ◽  
Potential System ◽  
Machine Interface

Cooperation between road users based on V2X communication has the potential to make road traffic safer and more efficient. The exchange of information enables the cooperative orchestration of critical traffic situations, such as truck overtaking maneuvers on freeways. With the benefit of such a system, questions arise concerning system failure or the abrupt and unexpected behavior of road users. A human-machine interface (HMI) organizes and negotiates the cooperation between drivers and maintains smooth interaction, trust, and system acceptance, even in the case of a possible system failure. A study was conducted with 30 truck drivers on a dynamic truck driving simulator to analyze the negotiation of cooperation requests and the reaction of truck drivers to potential system failures. The results show that an automated cooperation request does not translate into a significantly higher cooperation success rate. System failures in cooperative truck passing maneuvers are not considered critical by truck drivers in this simulated environment. The next step in the development process is to investigate how the success rate of truck overtaking maneuvers on freeways can be further increased as well as the implementation of the system in a real vehicle to investigate the reaction behavior of truck drivers in case of system failures in a real environment.

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