Any research that hopes to make clear comparisons must establish some consistent definitions.
Current literature fails to address the definition directly.
However, Carl Fuerst of Leisure Concepts and Designs, Inc. has provided the basis for a distinction. Although some of the comparison facilities included some waterpark features, they were still considered traditional swimming pools. This figure was the result, positive or negative, when the sum of all relevant expenses is deducted from the sum of all relevant revenue sources. The contact list considered only outdoor FACs or traditional swimming pools. Some additional facilities were eliminated when it was discovered that they could not be easily categorized as either FACs or traditional pools.