Guidelines for rule definition The specification document would include a definition or the operational scenarios and situations, and of the expected combinations of them, defining the design scope. In this example, the operational scenarios are the Primary operational modes, and the subordinate modes are those of the backup cooling systems.
Guidelines for rule definition
Guidelines for rule specification
The specifications would include the following mode set for the Primary operational modes: {Production, Maintenance}
The specifications would include the following mode set for the backup cooling sub system: {Stand-by, Disconnected for maintenance}
The combination Disconnected mode in the Production mode may be classified as either:
Guidelines for situation-dependent mode transition
Demonstration in the guide ...
According to this classification, the operational rules should be either constraining or alerting.
The specification is about what should be acceptable. In the example, the acceptable combinations are the combinations
The requirements should also specify the exceptional combinations. In this example, the only exceptional combination is of the Production mode with the Maintenance mode of the safety sub-systems.
Updated on 20 Apr 2016.