The Difference Between the
Function and the Action Elements
The Reliability Module provides two elements: the Function element and the Action element.
Function elements are used to represent services that are carried out over a period of time such as an air-conditioning system, a battery, or a back-up generator. The Function element provides outputs that at any given time in a simulation inform other elements in the model whether or not it is functioning correctly. This allows for dependency relationships to be easily defined, for example a radio component might require a power-supply component to be operating.
Action elements are very similar to Function elements, but have several additional features to facilitate representation of activities or processes that are carried out discretely (as opposed to continuously) such as when a door latches closed, a switch opens or closes, an engine starts, or a message is delivered. The Action component waits for a triggering input to tell it to carry out its action. If its action succeeds, the element emits an “ActionOK” event, and if it fails the element emits an “ActionFailed” event.
- Advanced Features of the Action Element
- Defining Failure Modes
- Defining Operating Requirements for Reliability Elements Using Logic Trees
- Inputs, Outputs and Features Specific to the Action Element
- Modeling Maintenance in the Reliability Module
- Modeling Resources in the Reliability Module
- Overview of the Action Element
- Overview of the Function Element
- The Common Inputs and Features of the Reliability Elements
- The Common Outputs and Locally Available Properties of the Reliability Elements
- The Difference Between the Function and the Action Elements
- Turning Components On and Off in the Reliability Module