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Procedures for Assessing Risks PowerPoint Presentation

Procedures for Assessing Risks

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Procedures for Assessing Risks . Chapter 9 – Failure Modes and Effects Analysis (FMEA). Failure Modes and Effects Analysis. Failure Mode A1. Failure Mode D1. Failure Mode B1. Failure Mode A2. Component A. Component B. Component D. Failure Mode C2. Failure Mode C1. Accidents*.

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### Procedures for Assessing Risks

Procedure for FMEA

Procedure for FMEA

Chapter 9 – Failure Modes and Effects Analysis (FMEA)

Failure Modes and Effects Analysis

Failure Mode A1

Failure Mode D1

Failure Mode B1

Failure Mode A2

Component A

Component B

Component D

Failure Mode C2

Failure Mode C1

Accidents*

Accidents*

Component C

*If applicable safeguards fail

Accidents*

Limitations of FMEA

- Examination of human error is limited
- Focus is on single-event initiators of problems
- Examination of external influences is limited
- Results are dependent on the mode of operation

Procedure for FMEA

1.0 Define the system of interest

2.0 Define the problems of interest for the analysis

3.0 Choose the type of FMEA approach for the study

4.0 Subdivide the system for analysis

5.0 Identify potential failure modes for elements of the system

9.0 Use the results in decision making

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

7.0 Perform quantitative evaluation (if necessary)

6.0 Evaluate potential failure modes capable of producing problems of interest

Procedure for FMEA

1.0 Define the system of interest

2.0 Define the problems of interest for the analysis

3.0 Choose the type of FMEA approach for the study

4.0 Subdivide the system for analysis

5.0 Identify potential failure modes for elements of the system

9.0 Use the results in decision making

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

7.0 Perform quantitative evaluation (if necessary)

6.0 Evaluate potential failure modes capable of producing problems of interest

1.0 Define the system of interest

- Intended functions
- Boundaries

Procedure for FMEA

1.0 Define the system of interest

2.0 Define the problems of interest for the analysis

3.0 Choose the type of FMEA approach for the study

4.0 Subdivide the system for analysis

5.0 Identify potential failure modes for elements of the system

9.0 Use the results in decision making

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

7.0 Perform quantitative evaluation (if necessary)

6.0 Evaluate potential failure modes capable of producing problems of interest

2.0 Define the problems of interest for the analysis

- Safety problems
- Environmental issues
- Economic impacts

1.0 Define the system of interest

2.0 Define the problems of interest for the analysis

3.0 Choose the type of FMEA approach for the study

4.0 Subdivide the system for analysis

5.0 Identify potential failure modes for elements of the system

9.0 Use the results in decision making

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

7.0 Perform quantitative evaluation (if necessary)

6.0 Evaluate potential failure modes capable of producing problems of interest

3.0 Choose the type of FMEA approach for the study

- Hardware approach (bottom-up)
- Functional approach (top-down)
- Hybrid of the two

1.0 Define the system of interest

2.0 Define the problems of interest for the analysis

3.0 Choose the type of FMEA approach for the study

4.0 Subdivide the system for analysis

5.0 Identify potential failure modes for elements of the system

9.0 Use the results in decision making

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

7.0 Perform quantitative evaluation (if necessary)

6.0 Evaluate potential failure modes capable of producing problems of interest

4.0 Subdivide the system by equipment or functions for analysis

Systems

Subsystems

Components

Subassemblies

Parts

Procedure for FMEA analysis

1.0 Define the system of interest

2.0 Define the problems of interest for the analysis

3.0 Choose the type of FMEA approach for the study

4.0 Subdivide the system for analysis

5.0 Identify potential failure modes for elements of the system

9.0 Use the results in decision making

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

7.0 Perform quantitative evaluation (if necessary)

6.0 Evaluate potential failure modes capable of producing problems of interest

5.0 Identify potential failure modes for elements of the system

- Premature operation
- Failure to operate at a prescribed time
- Intermittent operation
- Failure to cease operation at a prescribed time
- Accident of output or failure during operation
- Degraded output or operational capability
- Other unique failure conditions

Procedure for FMEA system

1.0 Define the system of interest

2.0 Define the problems of interest for the analysis

3.0 Choose the type of FMEA approach for the study

4.0 Subdivide the system for analysis

5.0 Identify potential failure modes for elements of the system

9.0 Use the results in decision making

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

7.0 Perform quantitative evaluation (if necessary)

6.0 Evaluate potential failure modes capable of producing problems of interest

6.0 Evaluate potential failure modes capable of producing problemsof interest

- Mission phase/operational mode
- Effects
- Causes
- Indications
- Safeguards
- Recommendations/remarks

Procedure for FMEA problems

1.0 Define the system of interest

2.0 Define the problems of interest for the analysis

3.0 Choose the type of FMEA approach for the study

4.0 Subdivide the system for analysis

5.0 Identify potential failure modes for elements of the system

9.0 Use the results in decision making

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

7.0 Perform quantitative evaluation (if necessary)

6.0 Evaluate potential failure modes capable of producing problems of interest

7.0 Perform quantitative evaluation problems(if necessary)

- Characterization of failure mode frequency
- Characterization of failure mode severity
- Characterization of failure mode risks

Procedure for FMEA problems

1.0 Define the system of interest

2.0 Define the problems of interest for the analysis

3.0 Choose the type of FMEA approach for the study

4.0 Subdivide the system for analysis

5.0 Identify potential failure modes for elements of the system

9.0 Use the results in decision making

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

7.0 Perform quantitative evaluation (if necessary)

6.0 Evaluate potential failure modes capable of producing problems of interest

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

Systems

Subsystems

Components

Subassemblies

Parts

Procedure for FMEA (if necessary or otherwise useful)

1.0 Define the system of interest

2.0 Define the problems of interest for the analysis

3.0 Choose the type of FMEA approach for the study

4.0 Subdivide the system for analysis

5.0 Identify potential failure modes for elements of the system

9.0 Use the results in decision making

8.0 Transition the analysis to another level of resolution (if necessary or otherwise useful)

7.0 Perform quantitative evaluation (if necessary)

6.0 Evaluate potential failure modes capable of producing problems of interest

9.0 Use the results in decision making (if necessary or otherwise useful)

- System improvements
- Maintenance task planning
- Spare parts inventories
- Troubleshooting guidelines

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