Explicitly Named Key Events

In contrasts to key decision factors with values that change over time, certain key events do not represent changes in a single piece of data, but rather a once-off significant event.

These key events are objects with:

• a localizable description, describing the event, e.g. person's date of birth; and
• the date on which the event occurred.

It is possible to combine a key decision factor that changes over time, e.g. an employment with earnings that vary over time, and the named events such as when the employment started and ended. For named events, you should analyze whether each event always occurs for the key decision factor, or just may occur. For example, an employment key decision factor will always have a start date but may or may not have an end date.