The card count is the exact ceiling of protected demand divided by container size.

highlighted = computed this step

Divide Protected Demand

Cards divide protected demand by container size and round up.

cards=protected demandcontainer size\text{cards}=\left\lceil\frac{\text{protected demand}}{\text{container size}}\right\rceil
Kanban cardsThe chart displays base and what-if protected demand and cards.kanban card countlead demand 240 x 2 = 480protected 480 + 60 = 540; container 30base protectedbase protected 540what-if protectedwhat-if protected 300base cardsbase cards 18what-if cardswhat-if cards 10caseleadlead demandsafetyprotectedcardsbase24806054018what-if12406030010deterministic kanban sizing arithmetic only

Cards

The exact card count is 18.

54030=18\left\lceil\frac{540}{30}\right\rceil = 18
Kanban cardsThe chart displays base and what-if protected demand and cards.kanban card countlead demand 240 x 2 = 480protected 480 + 60 = 540; container 30base protectedbase protected 540what-if protectedwhat-if protected 300base cardsbase cards 18what-if cardswhat-if cards 10caseleadlead demandsafetyprotectedcardsbase24806054018what-if12406030010deterministic kanban sizing arithmetic only