In order to measure the reliability and internal consistency of the scale that was used, Cronbach’s Alpha coefficient was used. When measuring the differences, Cronbach’s Alpha tests the reliability and internal consistency of the scale (Cronbach, 2004). While the first Cronbach’s Alpha coefficient towards the dimension of “the effective factors in the ISO 9000 QMS certification” which is the first factor of the scale in reliability study carried out is calculated as 0.82, the item total correlations were between 0.35 and 0.89. While Cronbach’s Alpha coefficient related to the dimension of “the difficulties encountered in ISO 9000 QMS certification” which is the second factor was 0.85, the item total correlations were between 0.37 and 0.70. While Cronbach’s Alpha coefficient related to the dimension “the benefits in ISO 9000 QMS certification” which is the third factor was 0.90, the item total correlations were between 0.70 and 0.86.For whole scale, Cronbach’s Alpha coefficient was calculated as 0.85, item total correlations have been realized between 0.34 and 0.74. According to this, it can be stated that the measurements obtained from the scale with the result of preliminary application have given fairly reliable results (Ozdamar, 2002).