| Term | Definition |
|---|
| System Features | Components, Purpose, Environment, Life Cycle |
| Conceptual Phase | A phase in the life of a system when the basic purpose and preliminary design of the system are formulated. |
| Engineering Phase | A phase in the life of a system when the system's design is constructed and prototypes are tested. |
| Production Phase | A phase in the life of a system when the actual system is created. |
| Operational Phase | A phase in the life of a system when the system is implemented |
| Disposal Phase | A phase in the life of a system when the system reaches the end of its useful life and is disposed of. |
| Change Analysis | An analysis that projects the effects a given system change is likely to have on an existing system. |
| Energy/Flow Analysis | An analysis of the flows or transfers of energy within an existing or proposed system - or between a system and an environment - checking for hazardous accumulations or escapes of energy. |
| Prototype analysis | An analysis that constructs a partial - or full - scale model of a system and tests it under a wide range of conditions to find limits of safe operation and forms of likely failure. |
| Job Safety Analysis (JSA) | An analysis that dissects a repetitive task, whether performed by a person or machine, to determine potential hazards if each action is not performed. |
| Scenario Analysis | An analysis that involves brainstorming the worst conceivable set of events that could befall a system, projecting the consequence of those events, and suggesting ways in which those events could be prevented. |
| Criticality Analysis | An analysis that identifies the critical components of a system and ranks the severity of losing each component. |
| Program Evaluation and Review Technique (PERT) | A technique that identifies a project's necessary accomplishments, called events, defines when the events must be finished for the project to be on schedule, and identifies those events that are most time-sensitive. |
| Time Sensitive Events (PERT) | These events must be done in sequence, cannot be done simultaneously, and cannot overlap. |
| Fault Tree Analysis (FTA) | An analysis that takes a particular system failure and traces the events leading to the system failure backwards in time. |
| Failure Mode and Effect Analysis (FMEA) | An analysis that reverses the direction of reasoning in fault tree analysis by starting with causes and branching out to consequences. |
| Technique of Human Error Rate Prediction (THERP) | An analysis that subdivides a particular person/machine activity into specific tasks, identifies the probability of error for each task an employee performs, and applies fault tree failure mode and effect analysis to determine the likelihood that the error will cause a system failure. |
| Root Cause | The real cause of an accident or problem and not just a symptom. |
| Direct Cause | Immediate event or condition that precipitated the accident. |
| Contributing Cause | Events or conditions that do not individually cause the accident, but that in a combination with other causes increase the likelihood of its occurence. |
| Barrier Analysis | A systematic process that can be used to identify physical, administrative, and procedural barriers or controls that should have prevented the accident. |
| Root Cause Analysis | A systematic procedure that uses the results of the other analysis techniques to identify the predominant cause of the accident. Repeatedly asking the question "Why?". |
Combine with other sets
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