The Experts below are selected from a list of 156 Experts worldwide ranked by ideXlab platform

Valerio Cozzani - One of the best experts on this subject based on the ideXlab platform.

  • safety assessment in plant layout design using indexing approach implementing inherent safety perspective part 1 Guideword applicability and method description
    Journal of Hazardous Materials, 2008
    Co-Authors: Alessandro Tugnoli, Faisal Khan, Paul Amyotte, Valerio Cozzani
    Abstract:

    Layout planning plays a key role in the inherent safety performance of process plants since this design feature controls the possibility of accidental chain-events and the magnitude of possible consequences. A lack of suitable methods to promote the effective implementation of inherent safety in layout design calls for the development of new techniques and methods. In the present paper, a safety assessment approach suitable for layout design in the critical early phase is proposed. The concept of inherent safety is implemented within this safety assessment; the approach is based on an integrated assessment of inherent safety Guideword applicability within the constraints typically present in layout design. Application of these Guidewords is evaluated along with unit hazards and control devices to quantitatively map the safety performance of different layout options. Moreover, the economic aspects related to safety and inherent safety are evaluated by the method. Specific sub-indices are developed within the integrated safety assessment system to analyze and quantify the hazard related to domino effects. The proposed approach is quick in application, auditable and shares a common framework applicable in other phases of the design lifecycle (e.g. process design). The present work is divided in two parts: Part 1 (current paper) presents the application of inherent safety guidelines in layout design and the index method for safety assessment; Part 2 (accompanying paper) describes the domino hazard sub-index and demonstrates the proposed approach with a case study, thus evidencing the introduction of inherent safety features in layout design.

  • Prevention of domino effect: from active and passive strategies to inherently safer design.
    Journal of Hazardous Materials, 2006
    Co-Authors: Valerio Cozzani, Alessandro Tugnoli, Ernesto Salzano
    Abstract:

    The possible application of an inherent safety approach to the prevention of domino accidents was explored. The application of the inherent safety Guidewords to the definition of effective actions for the prevention of domino events was analyzed. Due to the constraints originated by the conventional approach to process design, the "limitation of effects" Guideword resulted the more effective in the identification of inherent safety actions to avoid domino events. Detailed design criteria for the improvement of layout in the framework of inherent safety were identified and discussed. Simple rules of thumbs were obtained for the preliminary assessment of safety distances and of critical inventories with respect to the escalation of fires and explosions. The results evidenced that the integration of inherent safety criteria with conventional passive or active protections seems a promising route for the prevention of severe domino accidental scenarios in chemical and process plants.

David Powell - One of the best experts on this subject based on the ideXlab platform.

  • HASE - Experience with Model-Based User-Centered Risk Assessment for Service Robots
    2010 IEEE 12th International Symposium on High Assurance Systems Engineering, 2010
    Co-Authors: Jérémie Guiochet, Damien Martin-guillerez, David Powell
    Abstract:

    Safety is now a major concern in many computer based systems and more particularly for autonomous systems such as service robots in physical contact with humans. The traditional approach to analyze the safety of such systems is to use risk assessment methods based on models of system structure, or system behavior. Unfortunately, such models are hard to produce for autonomous systems. We propose an approach based on the standardized risk assessment process which is applied during the initial phases of the development process. We first use the common Unified Modeling Language (UML) and a preliminary application domain hazard analysis without considering any robotic device. Then, during the specification phase, a risk assessment of the robotic system is carried out. It consists in modeling tasks in UML, identifying hazardous situations (including human errors), and estimating associated risks. We base this analysis on an adaptation of the Guideword-based collaborative method HAZOP (HAZard OPerability) applied to UML models. The process has been successfully applied to the development of an assistive robot providing assistance for standing up, sitting down and walking, and health-state monitoring. Results in terms of integrability, usability, validity and applicability of the method are really encouraging. Majors benefits are a good management of the level of abstraction (and thus combinatory explosion is controlled), an easy communication between different stakeholders using basic UML diagrams, and a structured safety documentation required for certification.

  • SERENE - A UML-based method for risk analysis of human-robot interactions
    Proceedings of the 2nd International Workshop on Software Engineering for Resilient Systems - SERENCE '10, 2010
    Co-Authors: Damien Martin-guillerez, Jérémie Guiochet, David Powell, Christophe Zanon
    Abstract:

    Safety is a major concern for robots that interact physically with humans. We propose a risk analysis method based on deviation analysis of system usage scenarios that allows the identification of major risks. Scenarios are described with the common Unified Modeling Language (UML), and risk analysis is performed with the Guideword-based collaborative method HAZOP (HAZard OP-erability). We adapt HAZOP attributes and Guidewords for generic interpretation of UML use-case and sequence diagrams describing human-robot interactions. This approach has been systematically applied for the analysis of two quite different robots working in a human environment: a mobile manipulator and a robotic strolling assistant. When applied, the method gave conclusive evidence that the modeled systems were not safe. A CASE tool to support this method is also presented.

  • A UML-based method for risk analysis of human-robot interactions
    2010
    Co-Authors: Damien Martin-guillerez, Jérémie Guiochet, David Powell, Christophe Zanon
    Abstract:

    Safety is a major concern for robots that interact physically with humans. We propose a risk analysis method based on deviation analysis of system usage scenarios that allows the identification of major risks. Scenarios are described with the common Unified Modeling Language (UML), and risk analysis is performed with the Guideword-based collab-orative method HAZOP (HAZard OP-erability). We adapt HAZOP attributes and Guidewords for generic interpretation of UML use-case and sequence diagrams describing human-robot interactions. This approach has been systematically applied for the analysis of two quite different robots working in a human environment: a mobile manipulator and a robotic strolling assistant. When applied, the method gave conclusive evidence that the modeled systems were not safe. A CASE tool to support this method is also presented.

  • Experience with model-based user-centered risk assessment for service robots
    Proceedings of IEEE International Symposium on High Assurance Systems Engineering, 2010
    Co-Authors: Jérémie Guiochet, Damien Martin-guillerez, David Powell
    Abstract:

    Safety is now a major concern in many computer based systems and more particularly for autonomous systems such as service robots in physical contact with humans. The traditional approach to analyze the safety of such systems is to use risk assessment methods based on models of system structure, or system behavior. Unfortunately, such models are hard to produce for autonomous systems. We propose an approach based on the standardized risk assessment process which is applied during the initial phases of the development process. We first use the common Unified Modeling Language (UML) and a preliminary application domain hazard analysis without considering any robotic device. Then, during the specification phase, a risk assessment of the robotic system is carried out. It consists in modeling tasks in UML, identifying hazardous situations (including human errors), and estimating associated risks. We base this analysis on an adaptation of the Guideword-based collaborative method HAZOP (HAZard OPerability) applied to UML models. The process has been successfully applied to the development of an assistive robot providing assistance for standing up, sitting down and walking, and health-state monitoring. Results in terms of integrability, usability, validity and applicability of the method are really encouraging. Majors benefits are a good management of the level of abstraction (and thus combinatory explosion is controlled), an easy communication between different stakeholders using basic UML diagrams, and a structured safety documentation required for certification.

  • D.: Experience with modelbased user-centered risk assessment for service robots
    IEEE Computer Society, 2010
    Co-Authors: Jérémie Guiochet, Damien Martin-guillerez, David Powell
    Abstract:

    Abstract—Safety is now a major concern in many computerbased systems and more particularly for autonomous systems such as service robots in physical contact with humans. The traditional approach to analyze the safety of such systems is to use risk assessment methods based on models of system structure, or system behavior. Unfortunately, such models are hard to produce for autonomous systems. We propose an approach based on the standardized risk assessment process which is applied during the initial phases of the development process. We first use the common Unified Modeling Language (UML) and a preliminary application domain hazard analysis without considering any robotic device. Then, during the specification phase, a risk assessment of the robotic system is carried out. It consists in modeling tasks in UML, identifying hazardous situations (including human errors), and estimating associated risks. We base this analysis on an adaptation of the Guideword-based collaborative method HAZOP (HAZard OPerability) applied to UML models. The process has been successfully applied to the development of an assistive robot providing assistance for standing up, sitting down and walking, and health-state monitoring. Results in terms of integrability, usability, validity and applicability of the method are really encouraging. Majors benefits are a good management of the level of abstraction (and thus combinatory explosion is controlled), an easy communication between different stakeholders using basic UML diagrams, and a structured safety documentation required for certification. Keywords-Risk assessment; safety; UML; HAZOP; autonomous systems; service robot I

Alessandro Tugnoli - One of the best experts on this subject based on the ideXlab platform.

  • safety assessment in plant layout design using indexing approach implementing inherent safety perspective part 1 Guideword applicability and method description
    Journal of Hazardous Materials, 2008
    Co-Authors: Alessandro Tugnoli, Faisal Khan, Paul Amyotte, Valerio Cozzani
    Abstract:

    Layout planning plays a key role in the inherent safety performance of process plants since this design feature controls the possibility of accidental chain-events and the magnitude of possible consequences. A lack of suitable methods to promote the effective implementation of inherent safety in layout design calls for the development of new techniques and methods. In the present paper, a safety assessment approach suitable for layout design in the critical early phase is proposed. The concept of inherent safety is implemented within this safety assessment; the approach is based on an integrated assessment of inherent safety Guideword applicability within the constraints typically present in layout design. Application of these Guidewords is evaluated along with unit hazards and control devices to quantitatively map the safety performance of different layout options. Moreover, the economic aspects related to safety and inherent safety are evaluated by the method. Specific sub-indices are developed within the integrated safety assessment system to analyze and quantify the hazard related to domino effects. The proposed approach is quick in application, auditable and shares a common framework applicable in other phases of the design lifecycle (e.g. process design). The present work is divided in two parts: Part 1 (current paper) presents the application of inherent safety guidelines in layout design and the index method for safety assessment; Part 2 (accompanying paper) describes the domino hazard sub-index and demonstrates the proposed approach with a case study, thus evidencing the introduction of inherent safety features in layout design.

  • Prevention of domino effect: from active and passive strategies to inherently safer design.
    Journal of Hazardous Materials, 2006
    Co-Authors: Valerio Cozzani, Alessandro Tugnoli, Ernesto Salzano
    Abstract:

    The possible application of an inherent safety approach to the prevention of domino accidents was explored. The application of the inherent safety Guidewords to the definition of effective actions for the prevention of domino events was analyzed. Due to the constraints originated by the conventional approach to process design, the "limitation of effects" Guideword resulted the more effective in the identification of inherent safety actions to avoid domino events. Detailed design criteria for the improvement of layout in the framework of inherent safety were identified and discussed. Simple rules of thumbs were obtained for the preliminary assessment of safety distances and of critical inventories with respect to the escalation of fires and explosions. The results evidenced that the integration of inherent safety criteria with conventional passive or active protections seems a promising route for the prevention of severe domino accidental scenarios in chemical and process plants.

Jérémie Guiochet - One of the best experts on this subject based on the ideXlab platform.

  • HASE - Experience with Model-Based User-Centered Risk Assessment for Service Robots
    2010 IEEE 12th International Symposium on High Assurance Systems Engineering, 2010
    Co-Authors: Jérémie Guiochet, Damien Martin-guillerez, David Powell
    Abstract:

    Safety is now a major concern in many computer based systems and more particularly for autonomous systems such as service robots in physical contact with humans. The traditional approach to analyze the safety of such systems is to use risk assessment methods based on models of system structure, or system behavior. Unfortunately, such models are hard to produce for autonomous systems. We propose an approach based on the standardized risk assessment process which is applied during the initial phases of the development process. We first use the common Unified Modeling Language (UML) and a preliminary application domain hazard analysis without considering any robotic device. Then, during the specification phase, a risk assessment of the robotic system is carried out. It consists in modeling tasks in UML, identifying hazardous situations (including human errors), and estimating associated risks. We base this analysis on an adaptation of the Guideword-based collaborative method HAZOP (HAZard OPerability) applied to UML models. The process has been successfully applied to the development of an assistive robot providing assistance for standing up, sitting down and walking, and health-state monitoring. Results in terms of integrability, usability, validity and applicability of the method are really encouraging. Majors benefits are a good management of the level of abstraction (and thus combinatory explosion is controlled), an easy communication between different stakeholders using basic UML diagrams, and a structured safety documentation required for certification.

  • SERENE - A UML-based method for risk analysis of human-robot interactions
    Proceedings of the 2nd International Workshop on Software Engineering for Resilient Systems - SERENCE '10, 2010
    Co-Authors: Damien Martin-guillerez, Jérémie Guiochet, David Powell, Christophe Zanon
    Abstract:

    Safety is a major concern for robots that interact physically with humans. We propose a risk analysis method based on deviation analysis of system usage scenarios that allows the identification of major risks. Scenarios are described with the common Unified Modeling Language (UML), and risk analysis is performed with the Guideword-based collaborative method HAZOP (HAZard OP-erability). We adapt HAZOP attributes and Guidewords for generic interpretation of UML use-case and sequence diagrams describing human-robot interactions. This approach has been systematically applied for the analysis of two quite different robots working in a human environment: a mobile manipulator and a robotic strolling assistant. When applied, the method gave conclusive evidence that the modeled systems were not safe. A CASE tool to support this method is also presented.

  • A UML-based method for risk analysis of human-robot interactions
    2010
    Co-Authors: Damien Martin-guillerez, Jérémie Guiochet, David Powell, Christophe Zanon
    Abstract:

    Safety is a major concern for robots that interact physically with humans. We propose a risk analysis method based on deviation analysis of system usage scenarios that allows the identification of major risks. Scenarios are described with the common Unified Modeling Language (UML), and risk analysis is performed with the Guideword-based collab-orative method HAZOP (HAZard OP-erability). We adapt HAZOP attributes and Guidewords for generic interpretation of UML use-case and sequence diagrams describing human-robot interactions. This approach has been systematically applied for the analysis of two quite different robots working in a human environment: a mobile manipulator and a robotic strolling assistant. When applied, the method gave conclusive evidence that the modeled systems were not safe. A CASE tool to support this method is also presented.

  • Experience with model-based user-centered risk assessment for service robots
    Proceedings of IEEE International Symposium on High Assurance Systems Engineering, 2010
    Co-Authors: Jérémie Guiochet, Damien Martin-guillerez, David Powell
    Abstract:

    Safety is now a major concern in many computer based systems and more particularly for autonomous systems such as service robots in physical contact with humans. The traditional approach to analyze the safety of such systems is to use risk assessment methods based on models of system structure, or system behavior. Unfortunately, such models are hard to produce for autonomous systems. We propose an approach based on the standardized risk assessment process which is applied during the initial phases of the development process. We first use the common Unified Modeling Language (UML) and a preliminary application domain hazard analysis without considering any robotic device. Then, during the specification phase, a risk assessment of the robotic system is carried out. It consists in modeling tasks in UML, identifying hazardous situations (including human errors), and estimating associated risks. We base this analysis on an adaptation of the Guideword-based collaborative method HAZOP (HAZard OPerability) applied to UML models. The process has been successfully applied to the development of an assistive robot providing assistance for standing up, sitting down and walking, and health-state monitoring. Results in terms of integrability, usability, validity and applicability of the method are really encouraging. Majors benefits are a good management of the level of abstraction (and thus combinatory explosion is controlled), an easy communication between different stakeholders using basic UML diagrams, and a structured safety documentation required for certification.

  • D.: Experience with modelbased user-centered risk assessment for service robots
    IEEE Computer Society, 2010
    Co-Authors: Jérémie Guiochet, Damien Martin-guillerez, David Powell
    Abstract:

    Abstract—Safety is now a major concern in many computerbased systems and more particularly for autonomous systems such as service robots in physical contact with humans. The traditional approach to analyze the safety of such systems is to use risk assessment methods based on models of system structure, or system behavior. Unfortunately, such models are hard to produce for autonomous systems. We propose an approach based on the standardized risk assessment process which is applied during the initial phases of the development process. We first use the common Unified Modeling Language (UML) and a preliminary application domain hazard analysis without considering any robotic device. Then, during the specification phase, a risk assessment of the robotic system is carried out. It consists in modeling tasks in UML, identifying hazardous situations (including human errors), and estimating associated risks. We base this analysis on an adaptation of the Guideword-based collaborative method HAZOP (HAZard OPerability) applied to UML models. The process has been successfully applied to the development of an assistive robot providing assistance for standing up, sitting down and walking, and health-state monitoring. Results in terms of integrability, usability, validity and applicability of the method are really encouraging. Majors benefits are a good management of the level of abstraction (and thus combinatory explosion is controlled), an easy communication between different stakeholders using basic UML diagrams, and a structured safety documentation required for certification. Keywords-Risk assessment; safety; UML; HAZOP; autonomous systems; service robot I

Paul Amyotte - One of the best experts on this subject based on the ideXlab platform.

  • safety assessment in plant layout design using indexing approach implementing inherent safety perspective part 1 Guideword applicability and method description
    Journal of Hazardous Materials, 2008
    Co-Authors: Alessandro Tugnoli, Faisal Khan, Paul Amyotte, Valerio Cozzani
    Abstract:

    Layout planning plays a key role in the inherent safety performance of process plants since this design feature controls the possibility of accidental chain-events and the magnitude of possible consequences. A lack of suitable methods to promote the effective implementation of inherent safety in layout design calls for the development of new techniques and methods. In the present paper, a safety assessment approach suitable for layout design in the critical early phase is proposed. The concept of inherent safety is implemented within this safety assessment; the approach is based on an integrated assessment of inherent safety Guideword applicability within the constraints typically present in layout design. Application of these Guidewords is evaluated along with unit hazards and control devices to quantitatively map the safety performance of different layout options. Moreover, the economic aspects related to safety and inherent safety are evaluated by the method. Specific sub-indices are developed within the integrated safety assessment system to analyze and quantify the hazard related to domino effects. The proposed approach is quick in application, auditable and shares a common framework applicable in other phases of the design lifecycle (e.g. process design). The present work is divided in two parts: Part 1 (current paper) presents the application of inherent safety guidelines in layout design and the index method for safety assessment; Part 2 (accompanying paper) describes the domino hazard sub-index and demonstrates the proposed approach with a case study, thus evidencing the introduction of inherent safety features in layout design.

  • Safety Assessment in Plant Layout Design using Indexing Approach: Implementing Inherent Safety Perspective. Part 1 – Guideword applicability and method description
    2008
    Co-Authors: A. Tugnoli, Faisal Khan, Paul Amyotte, V. Cozzani
    Abstract:

    Layout planning plays a key role in the inherent safety performance of process plants since this design feature controls the possibility of accidental chain-events and the magnitude of possible consequences. A lack of suitable methods to promote the effective implementation of inherent safety in layout design calls for the development of new techniques and methods. In the present paper, a safety assessment approach suitable for layout design in the critical early phase is proposed. The concept of inherent safety is implemented within this safety assessment; the approach is based on an integrated assessment of inherent safety Guideword applicability within the constraints typically present in layout design. Application of these Guidewords is evaluated along with unit hazards and control devices to quantitatively map the safety performance of different layout options. Moreover, the economic aspects related to safety and inherent safety are evaluated by the method. Specific sub-indices are developed within the integrated safety assessment system to analyze and quantify the hazard related to domino effects. The proposed approach is quick in application, auditable and shares a common framework applicable in other phases of the design lifecycle (e.g. process design). The presentwork is divided in two parts: Part 1 (current paper) presents the application of inherent safety guidelines in layout design and the index method for safety assessment; Part 2 (accompanying paper) describes the domino hazard sub-index and demonstrates the proposed approach with a case study, thus evidencing the introduction of inherent safety features in layout design

  • Evaluation of available indices for inherently safer design options
    Process Safety Progress, 2003
    Co-Authors: Faisal Khan, Rehan Sadiq, Paul Amyotte
    Abstract:

    Inherent safety is a proactive approach for loss prevention during process plant design. It has been proven that, considering the lifetime costs of a process and its operation, an inherent safety approach can lead to a cost-optimal option. Application of inherent safety at the early stages of process design yields the best results with respect to process selection, conceptual design, and engineering design. However, in spite of being an attractive and cost-effective approach to loss prevention, it is not widely used. Reasons have been suggested for this lack of widespread use, but the lack of systematic tools to apply inherent safety principles is perhaps the most important one. A detailed study was conducted to analyze the performance of available hazard indices with reference to various inherent safety principles (Guidewords). The performance of four main indices (Dow, Mond, Inherent Safety, and Safety Weighted Hazard [SweHI] indices) was studied for five inherent safety Guidewords. None of the indexing procedures can capture all of the inherent safety Guidewords, although the SWeHI and Dow Index were found to be robust on many accounts. It is recommended that a new specific index be developed for inherently safer design evaluation. The SWeHI and Dow indexing procedures may be a good basis on which to build.