Heijunka box

The heijunka box makes it easy to see what type of jobs are queued for production and for when they are scheduled.

Workers on the process remove the kanban cards for the current period from the box in order to know what to do.

The Heijunka box allows easy and visual control of a smoothed production schedule.

In this illustration, each time period builds an A and two Bs along with a mix of Cs, Ds and Es.

This ensures that production capacity is kept under a constant pressure thereby eliminating many issues.