Presentation on theme: "System Safety's Role in Requirements Analysis"— Presentation transcript:
1System Safety's Role in Requirements Analysis Exploring ConcurrentSystems Engineering&System Safety EngineeringActivities in EarlyProgram Development
2System Engineering mission: DODI (paraphrased)Translate an operational need into a configured systemIntegrate all technical disciplines in a coordinated effort that meets cost schedule and performanceEnsure compatibility of interfacesEnsure design meets requirementsMeasure and control technical risk
3System Safety Mission: Mil-Std- 882 (paraphrased)Optimize safety, within cost and operational effectiveness, at a system level (System Safety Program)Influence the translation of operational needs into a configured system with appropriate safety characteristics (PHL, Safety Design Guidelines, PHA, SSHA, OSHA, etc)Influence all technical disciplines in a coordinated effort to ensure that safe design practices are uniformly applied and identified hazards are controlled (Safety Design Guidelines, Hazard Mitigation and Tracking)Ensure compatibility of interfaces where interfaces effect the safety of the system (PHL, PHA, SSHA, OSHA, etc)Ensure design meets requirements where requirements are safety driven (V&V of Safety Design Guidelines, Hazard Mitigation and Tracking)Measure and control safety risk (see above)
5Understanding Unifies Process Explore the integration of parallel activities into concurrent activitiesMinimize “over the wall” activitiesInvolve System Safety in Systems ProcessesInvolve Systems Engineering in System Safety Processes
6Good Requirements Singular in scope Shall State specific need or objectiveBe verifiable or measurableSample Safety Requirements:... shall conduct a preliminary systems safety andhazards analysis and prepare a preliminarysystems safety hazard list....Design shall comply with OSHA...System SafetyRequirementsare notoriouslypoorly developedand rarely relateto the product
7Early System Safety Involvement is crucial Early involvement of system safety engineers is crucial to:Improving Trade Off studies and analysesReducing poorly defined safety requirementsProperly evolving general and regulatory requirements to good workable requirementsProperly allocating safety requirements for flow downimproving safety design guidelinesSystem Safety EngineersAre valuable assets toearly development and areunderutilized in this phase
8Working together works better As system engineers understand more about system safety and system safety engineers understand more about system engineering the “over the wall” evolves into concurrent engineering.
9Better understanding through participation Personal, professional and organizational involvement to improve work productsChapter cross training/ joint meetingsPersonal networkingEnjoy!