Figure 162 hazard scenario model c upes not for

This preview shows page 222 - 224 out of 334 pages.

Figure 16.2: Hazard Scenario Model (c) UPES, Not for Reproduction/ Sale
Image of page 222
UNIT 16: Principle of System Safety Notes ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ Definitions for Use Acquisition Process: The FAA System Engineering Council (SEC) has approved specific definitions for Severity and Likelihood to be used during all phases of the acquisition life cycle. These are shown in Table 16.1 and Table 16.2. Table 16.1: Severity Definitions for FAA AMS (Acquisition Management System) Process Catastrophic Results in multiple fatalities and/or loss of the system Hazardous Reduces the capability of the system or the operator ability to cope with adverse conditions to the extent that there would be: Large reduction in safety margin or functional capability Crew physical distress/excessive workload such that operators cannot be relied upon to perform required tasks accurately or completely 1. Serious or fatal injury to small number of occupants of aircraft (except operators) 2. Fatal injury to ground personnel and/or general public Major Reduces the capability of the system or the operators to cope with adverse operating condition to the extent that there would be – Significant reduction in safety margin or functional capability Significant increase in operator workload Conditions impairing operator efficiency or creating significant discomfort Physical distress to occupants of aircraft (except operator) including injuries Major occupational illness and/or major environmental damage, and/or major property damage Minor Does not significantly reduce system safety. Actions required by operators are well within their capabilities. Include Slight reduction in safety margin or functional capabilities Slight increase in workload such as routine flight plan changes. Some physical discomfort to occupants or aircraft (except operators) Minor occupational illness and/or minor environmental damage, and/or minor property damage No Safety Effect Has no effect on safety Table 16.2: Likelihood of Occurrence Definitions Qualitative: Anticipated to occur one or more times during the entire system/operational life of an item. Probable Quantitative: Probability of occurrence per operational hour is greater that 1 × 10 –5 Qualitative: Unlikely to occur to each item during its total life. May occur several time in the life of an entire system or fleet. Remote Quantitative: Probability of occurrence per operational hour is less than 1 × 10 –5 , but greater than 1 × 10 –7 Qualitative: Not anticipated to occur to each item during its total life. May occur a few times in the life of an entire system or fleet. Extremely Remote Quantitative: Probability of occurrence per operational hour is less than 1 × 10 –7 but greater than 1 × 10 –9 Qualitative: So unlikely that it is not anticipated to occur during the entire operational life of an entire system or fleet.
Image of page 223
Image of page 224

You've reached the end of your free preview.

Want to read all 334 pages?

  • Fall '19
  • Instrument approach, Runway, Rajiv, Aviation Safety & Security Management

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors