Execution is the degree to which the gymnast performs with aesthetic and technical perfection. The execution score is composed of artistic faults and technical faults. In the first, the unity and character of the composition, harmony with the music, body expression and the variety in the use of space and apparatus elements, among others are valued; on the other hand, the technical handling of the apparatus (like catching the ball with one hand and not two, not losing the apparatus, etc.) and technical aspects of body movements (like touching the head with the foot during a ring form, not falling, etc.) are valued. Errors regarding the perfect model of conduct accumulate and are assigned specific penalty values, which ultimately are subtracted from the starting value (an execution score of 10 represents a perfect execution equal to the model, without any error).