Why some Competitions have one judge and others have three judges. Why scoring maybe 1 to 5 points, 3 to 9 points, or another range.  Why an image will receive a high score in one judging and a lower at another judging.  Why an image maybe accepted in one Exhibition and not accepted in another Exhibition.

Photographic Judging and Critiquing by John Meek (as published in the February 2004,
     PSA Journal and provided here with permission of the author and PSA).

Judging Handbook:  The Chicago Area Camera Clubs Association, September 2002

Criticizing Photography in a Camera Club by Claudia Bodmer (as published in the February 2008, PSA Journal and provided here with permission of the author and PSA).