Event plot
main topics 

A plot of events (failures and retirements) for all systems. The plot consists of:

·    Horizontal lines, which represent the lifetime of each system

·    Cross (X) points, which represent the failure and retirement times of each system

·    Cost values or frequencies (optional), which represent the cost or frequency of failure at the cross points

Use the event plot to visually determine whether successive failures are increasing, decreasing, or remaining constant.

Below are examples of event plots for improving, stable, and deteriorating systems.