In order to design choreography callers must have an intimate knowledge of the characteristics of each call they use. The purpose of a Call Analysis Sheet is to provide a format for analyzing each call and documenting that information. Four examples are provided in the links above. The first is the official CALLERLAB version, which has both a blank form and a sample that has been filled in with a call (Square Thru). The second is provided by Jeff Priest who owns the Canadian Caller College. The third was created by Greg Moore and shared at the Northeast Caller School in 2019. The fourth was created by Janet Lewis.