Accumulating Snapshot Fact Table

What has happened throughout the period?

Amazon Order.. what happened at several time intervals.

Order Date
Shipping Date
Est Arrival Date
Fulfilling Date
Delivered Date

Src: www.aroundbi.com

As the process moves from one step to another, these get updated.

Accumulating snapshot always has different date fields denoting multiple stages of the process.

Another example: Hospital entry

Here we Insert once and update the rest.