The Heijunka Approach for Mixed$-$Model Scheduling

$1$ point possible $($graded$)$

Which of the following statements about the Hejunka approach on Mixed$-$Model Scheduling is Not correct

The units are sequenced as uniformly as possible based on propor tionate demand.

The production should be kept flexible enough to be able to produce smatl batch quantities.

The production shoutd be kept stable enough to only produce large batch qpentities: