Zhang Chi's class: several types and differences of Six Sigma data

Six Sigma is a methodology based on data , It is widely used in daily work , It can help solve all kinds of difficult and miscellaneous diseases . But many Six Sigma enthusiasts are not familiar with several types and differences of data , Here is a brief introduction to Zhang Chi's class ：

The four types of data are ： Class data 、 Ordered data 、 Fixed distance data and fixed ratio data .

1、 Class data ：

The measurement level of classified data is the lowest , It is to classify things in parallel , Distinguish and distinguish according to the difference of phenomenon nature . The exact value of a variable or indicator of a given class is expressed in words , It can be identified by numerical value , Only for labeling , All categories are equal , There is no height 、 size 、 The difference between good and bad . Such as color 、 Gender 、 Line type 、 Shift, etc .

2、 Ordered data ：

Sequenced data is to distinguish and differentiate according to the differences in the order of phenomena . The measurement results form ordered variables or ordered indicators . The exact value of ordered variables or indicators can be expressed in words , It can also be identified by numerical value , There are high and low advantages and disadvantages among the categories of ordered variables or indicators , Do not arrange randomly . Such as ： The yellow belt of Six Sigma 、 Greenbelt 、 Black Belt 、 Master Black Belt ; The level of Membership ： Bronze Member 、 Silver members 、 Gold members 、 Platinum members, etc .

3、 Distance data ：

The fixed distance data is to distinguish and distinguish according to the absolute quantity difference of phenomena . The measurement results form a distance variable or distance index . The value of the distance variable or index is expressed in numbers , There are units of measurement , You can add and subtract . There are nature and size , But there is no absolute zero , Cannot multiply or divide . Such as weather and temperature ： Beijing 23-35 degree , Shanghai 27-37 Degree, etc. .

4、 Fixed ratio data ：

The fixed ratio data is to distinguish and distinguish between absolute and relative differences of phenomena . The measurement results form a constant ratio variable or constant ratio index . It can be expressed in numbers , There are units of measurement , You can add and subtract , At the same time, there is also zero in the absolute sense , You can also perform multiplication and division . Such as ： The volume of an object 、 weight 、 Dimensions 、 The stock of 、 Income, etc .

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