肯德尔和谐系数是计算多个等级变量相关程度的一种相关量。前述的spearman等级相关讨论的是两个等级变量的相关程度，用于评价时只适用于两个评分者评价N个人或N件作品，或同一个人先后两次评价N个人或N件作品，而kandall和谐系数则适用于数据资料是多列相关的等级资料，即可是k个评分者评(N)个对象，也可以是同一个人先后k次评N个对象。通过求得kandall和谐系数，可以较为客观地选择好的作品或好的评分者。-Kendall coefficient of concordance is a quantity in the calculation of multiple grade variable. Aforementioned spearman rank correlation discussed the variables of two levels

Degree of correlation for the evaluation applies only to the two raters evaluate N individuals or the N-piece, or the same person twice evaluation of N individuals or N pieces

Products, while kandall coefficient of concordance is applicable to data is a multi-column level information can rater assessment (N) objects, can also be the same

One has k rating of N objects. By obtained kandall coefficient of concordance, can provide a more objective selection of good works or good ratings.