Presentation on theme: "What is System Safety? System Safety is an effort to make things as safe as practical by systematically using engineering and management tools to identify,"— Presentation transcript:
1What is System Safety?System Safety is an effort to make things as safe as practical by systematically using engineering and management tools to identify, analyze and control hazards“Effort” in this case is synonymous with an:ApproachDisciplineConceptDoctrinePhilosophy
2What “things” are we talking about making safe? SystemsProgramsProjectsProductsOperationsFacilities
3How safe is “…as safe as practical?” Regulatory compliantRecognized industry “best practice”Proactively Managed Risk
4What “system” are we talking about? Any composite of:People (Man)Hardware (Machine)Tasks & Procedures (Mission)Environment (Medium)
55 M model Represents the casual factors in accidents 5 main areas become a meaningful checklistIntertwined circles illustrate interactionInterrelated areas focus on missionMission accomplishment is implicit to system safety effort
6Man-Machine-Environment T.P. Wright introduced this concept to aviation safety in the late 1940’sTriad adopted by USC instructors and became the 3-M modelManagement, the 4th M, added in 1965Mission added in 1976 by E.A. Jerome of the Flight Safety FoundationMan-machine-medium mission-management factors represent a valuable model for examining the nature of accidentsWhen seeking causal factors or preventative actions the diagram helps ensure all factors are considered.T.P. Wright of Cornell University first introduce the man-machine-environment triad to aviation language in the 1940’s.He was influential in the development of the Cornell-Guggenheim Aviation Safety Division of the University College, USC.Management emphasized the interrelationships between 3-m and management.Mission factors discussed at military-oriented USC course but not introduced into the diagram until 1976 at the suggestion of Mr. E. A. Jerome a staff member of the Flight Safety Foundation
7Why System Safety? Primary reason is to achieve better results! Regulatory compliance is a minimalist approachExemplar “best practices” may not recognize hazards unique to your systemCodes, standards and regulations tend to lag leading-edge activitiesPrimary reason is to achieve better results!
8“Systematic methods with a measured approach to identifying, analyzing, and controlling hazards aid in reducing errors and improve task accomplishment through increased effectiveness and efficiency”
9You are about to be evaluated on a task You are about to be evaluated on a task. It will be timed so work quickly but safely -- Accuracy is paramount!FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF MANY YEARS.
10How many F’s did you count? 2345None of the Above?
11Starting at the end of the sentence count backwards and mentally X each letter F. Use your fingers to tally each X. Accuracy is paramount – time is of no concern.FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF MANY YEARS.
12A “systems” approach will reduce errors even for simple tasks Almost all operations benefit from a combination of controlsA “safety precedent” dictates an order of approachesThis precedent sequence is one of the “common strategies” in various systems approaches used todayNot all safety systems are created equal
13Safety, who is responsible? Management has overall responsibility for ensuring programs are established, staffed, trained and resourcedThe safety community has responsibility for support, education, tools & techniques, and monitoring progressThe engineers are responsible to provide hardware expertise, perform analyses and to make design changes
14Systems Safety Working Group (SSWG) Project ManagersDesign EngineersSafety EngineersEnd User (customer)
15Final CommentsSystem Safety efforts begin with the system conceptualizationContinue through initial design and constructionSustained during operational life cycleFollow through with system disposalA “cradle to grave” program