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BlockSim Phase Diagrams

A phase diagram, or more specifically a reliability phase diagram, is an extension of the reliability block diagram (RBD) approach. While an RBD is used for a system with a fixed configuration throughout the entire period of operation, a phase diagram can be used to represent scenarios in which a system may undergo changes over time to one or more of the following:

• Its reliability configuration

• The available repair resources

• The failure, maintenance or throughput properties of its individual components.

For example, a manufacturing company's production may be lower during the night shift than during the day shift. Or a system may use different components during different stages of operation, such as an aircraft during taxiing, takeoff, cruising and landing. In these and many other situations, a phase diagram can be configured so that the simulation will account for the differences in the system during different time periods.

The topics in this section address the following:

• Introduction to phase diagrams.

• Using the phase diagram control panel.

• Configuring and using blocks in phase diagrams, including:

• • Operational phase blocks

  • Maintenance phase blocks and maintenance templates

  • Subdiagram phase blocks

  • Node blocks and stop blocks

• Assumptions used when simulating phase diagrams.

• Available results and plots.

• Performing throughput analysis with phase diagrams.

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