Trigger Events are the occurrences during the life of an asset that causes new or updated information to be required.
There are two types of trigger event:

1. Foreseen – planned for in advance of them happening, for example regular maintenance or inspections.
2. Unforeseen – acts of God, or random occurrences, or so infrequent or unpredictable that it is impractical to plan for them in advance, for example lightning strike.