Patent ID: 8639646
Filing Date: 2014-01-28
Classification: G05B

Abstract:
1. A system to build, analyze, and manage a computer generated risk assessment model and perform a layer of protection analysis using a computer generated safety instrumented system model for managing a process safety lifecycle for a safety instrumented system in a facility, wherein the computer generated safety instrumented system model has at least one instrumented protective function, and wherein the system comprises: a. a processor; b. a data storage connected to the processor that engages a network to communicate with at least one client device; c. computer instructions to import process hazard analysis and layer of protection analysis data from a third party; d. computer instructions to allow a user to select a study type which is a process hazard analysis study, a hazard and operability study, a layer of protection analysis study, or combinations thereof; e. computer instructions to form a study type table comprising a plurality of study types selected from the group: a study type name, a study type description, a study type identifier, and combinations thereof; f. computer instructions to allow the user to select a methodology type which is a consequence based methodology, a cause based methodology, or scenario based methodology; g. computer instructions to form a methodology type table comprising a plurality of methodology types from the group: a methodology type name, a methodology type description, a methodology type identifier, and combinations thereof; h. computer instructions to form a study library, wherein the study library comprises a member of the group: a study name, a study description, a study type identifier from the study type table, the methodology type identifier from the methodology type table, a user location, and combinations thereof, and wherein each study has a study identifier; i. computer instructions to form a node library, wherein the node library comprises a member of the group: a node description, a node boundaries, a process location, a design conditions, an operating conditions, a node number, and combinations thereof, and wherein each node has a node identifier; j. computer instructions to form a session library, wherein the session library comprises a member of the group: a session identifier, a session name, a session date, a session duration, and combinations thereof, and wherein each session has one of the study identifiers from the study library; k. computer instructions to form a session—node relationship table to link a member from the session library to at least one node; l. computer instructions to form a deviation library, wherein the deviation library comprises a member of the group: a deviation name, a deviation description, a PHA-Xref suffix, and combinations thereof, and wherein each deviation has a deviation identifier; m. computer instructions to form a scenario library, wherein the scenario library comprises a plurality of scenarios, wherein each scenario has the deviation identifier from the deviation library, the node identifier from the node library, the node number from the node library connected to the PHA-Xref suffix from the deviation library, and a scenario identifier; n. computer instructions to form a consequence library, wherein the consequence library has a plurality of consequences, wherein each consequence comprises: a consequence name, a consequence identifier, a consequence description, and a layer of protection analysis criteria, and the consequence library further includes a member of the group connected to the consequence, selected from the group consisting of: o. computer instructions to form a scenario—consequence relationship table connecting the scenario identifier from the scenario library with the consequence identifier from the consequence library; p. computer instructions to generate a cause library with a plurality of causes, each cause having a cause identifier, a cause name, a cause description, a cause type, a cause frequency, and a cause remark; q. computer instructions to form a scenario—cause relationship table connecting the scenario identifier from the scenario library with the cause identifier from the cause library; r. computer instructions to form a cause—consequence relationship table connecting the cause identifier from the cause library with the consequence identifier from the consequence library, and wherein each cause—consequence relationship has a cause—consequence identifier; s. computer instructions to form a safeguards library with a plurality of safeguards, wherein each safeguard has: a safeguard name, a safeguard description, an independent protection layer basis, a safeguard identifier, an independent protection layer type, and a probably of failure on demand value; t. computer instructions to form a cause—consequence—safeguards relationship table connecting the cause—consequence identifier from the cause—consequence relationship table and the safeguard identifier from the safeguard library; u. computer instructions to form a computer generated risk assessment model for managing the process safety lifecycle for the safety instrumented system in the facility by: v. computer instructions in the data storage to assign a tag name to at least one component identifier and to assign at least one voting instruction to at least one assembly identifier and at least one assembly group identifier, creating the computer generated safety instrumented system model with a functional specification and a physical specification for all of the instrumented protective function for the facility in real time; w. computer instructions in the data storage to execute safety integrity level calculations using: x. computer instructions for performing the layer of protection analysis to calculate a target probability of failure on demand for each instrumented protective function and compare it to the achieved probability of failure on demand from the computer generated safety instrumented system model using: y. computer instructions for performing safety integrity level selection for each instrumented protective function using the calculated target probability of failure on demand; and z. computer instructions for editing a component of a study, wherein the component of the study is a member of the group consisting of: