Method of evaluation of space systems for safety assurance and residual risk to flightcrew
First Claim
1. A process for evaluating space systems for safety assurance and residual risk to the flight crew, the process comprising:
- identifying hazards;
identifying Safety Critical Subsystems;
identifying Safety Critical Subsystems failure modes and effects;
proceeding with assessment of risk at subsystem level;
collecting risk calculation to a top level for determination of contractual or statement of work compliance and verification of assessment of risk by test, and resolving verification failures or analytical failures through design or procedural changes until contract or statement of work compliance at a minimum is achieved.
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Abstract
A process for evaluating space systems for safety assurance and residual risk to the flight crew. The process includes a success oriented System Safety phase which attempts to reduce the probability of failure with respect to the loss of a crew member as low as practical; a failure oriented SPACESAFE phase which assumes that at least one Safety Critical Subsystem has failed and attempts to engineer a risk mitigation design minimize adverse effects on the crew; and an Integration phase which complimentary integrates the System Safety phase with the SPACESAFE phase. Such process allows for increased flight crew safety by minimizing risk of a failures that contribute to loss of a crew member.
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Citations
15 Claims
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1. A process for evaluating space systems for safety assurance and residual risk to the flight crew, the process comprising:
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identifying hazards;
identifying Safety Critical Subsystems;
identifying Safety Critical Subsystems failure modes and effects;
proceeding with assessment of risk at subsystem level;
collecting risk calculation to a top level for determination of contractual or statement of work compliance and verification of assessment of risk by test, and resolving verification failures or analytical failures through design or procedural changes until contract or statement of work compliance at a minimum is achieved. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11)
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4. A process for evaluating space systems for safety assurance and residual risk to the flight crew, the process comprising:
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a success oriented System Safety phase which sets the probability of failure with respect to the loss of a crew member as low as practical;
a failure oriented SPACESAFE phase which assumes that at least one Safety Critical Subsystem has failed; and
an Integration phase which complimentary integrates the System Safety phase with the SPACESAFE phase;
wherein flight crew safety is increased by minimizing accepted risk of a failure with respect to loss of a crew member.
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12. A process for evaluating space systems for safety assurance and residual risk to the flight crew, the process including a first phase including, performing a system baseline and identifying Safety Critical Subsystems;
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identifying risk mitigations options;
documenting recommendations for System Safety;
performing a rough order of magnitude parametric cost estimate;
performing a management review; and
determining whether a mitigation is in or out of the identified Safety Critical Subsystem, wherein if the mitigation is in the Safety Critical Subsystem, the recommendation is documented for a customer and the customer'"'"'s response is archived, or if the mitigation is not in the Safety Critical Subsystem, a contractor initiates a SPACESAFE change.
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13. The process for evaluating space systems according to claim 13, further including a second phase including, preparing initial designs;
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performing a cost/benefit analysis;
creating an Engineering Change Proposal;
performing a management review;
submitting the Engineering Change Proposal to the customer for review and approval, wherein the SPACESAFE change is implemented is the change is approved or if the change is not approved, the response of the customer is documented. - View Dependent Claims (14, 15)
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Specification