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collected data. As shown next, you can look at it from two standpoints: quantitative
and qualitative.

Power usage

Quantitative reviews are
based on measured data.
Effectiveness of power reduction program

Qualitative reviews are
based on interviews or
other subjective sources of
information.

Quantitative Reviews
Quantitative reviews are the meat and potatoes of data review. This involves looking at the
numbers and figuring out what they mean based on the data available. You can look at such
details as the following:

• Usage profiles Look for consumption peaks and valleys, and figure out how they
relate to your overall operations.
• Performance comparisons Use the data to compare two similar facilities in your
organization. For instance, if you have branches in Spokane, Washington and
Albany, New York, how do the same facilities in these branches stack up against
each other?
• High costs Look at the data to see where you are spending a lot of money on
energy use.
• What’s missing Look for any areas where you feel like you need more information,
and then start collecting it.