ISO22514-6:2013提供了计算过程或产品数量的性能和能力统计的方法，其中考虑相互关联的一系列奇异数量是必要的或有益的。这里提供的方法主要用于描述遵循二元正态分布的量。原则上，ISO 22514的这一部分可用于多变量情况。 ISO 22514-6:2013没有针对每种方法可能应用的不同情况，对提供的不同方法进行评估。对于当前状态，可以根据用户偏好选择一种更可取的方法。 目的是在多过程或产品数量描述的情况下，为性能和能力的不同指数计算方法给出定义。

ISO 22514-6:2013 provides methods for calculating performance and capability statistics for process or product quantities where it is necessary or beneficial to consider a family of singular quantities in relation to each other. The methods provided here mostly are designed to describe quantities that follow a bivariate normal distribution. In principle, this part of ISO 22514 can be used for multivariate cases. ISO 22514-6:2013 does not offer an evaluation of the different provided methods with respect to different situations of possible application of each method. For the current state, the selection of one preferable method might be done following the users preferences. The purpose is to give definitions for different approaches of index calculation for performance and capability in the case of a multiple process or product quantity description.