The phrase "mix shift" refers to a change in the combination or proportion of different things. It means that the balance or mixture of certain elements or factors is shifting from one variety to another. Full definition
In a big bowl, mix the shifted flour and sugar, then add in the butter. (cookingninja.com)
In the quarter, hardware sales to enterprise customers accounted for a larger percentage and was responsible for the negative mix shift. (thecollegeinvestor.com)
We remain upbeat about the near - term forecast, however, there has been some uncertainty regarding Goodyear's unfavorable product mix shift toward cheaper parts and away from its lucrative commercial goods. (valueline.com)