The reason that the term "aggregation" is used is because the specific identities of only some of the units are merged into a common pool of standard units or standard hours.

Question

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Aggregation refers to the process of combining multiple units or data points into a single group or category, often to simplify analysis or reporting, without necessarily merging their identities into a common pool of standard units or hours.

The Reason That the Term "Aggregation" Is Used Is Because