Protected demand is lead-time demand plus the safety allowance.

highlighted = computed this step

Lead-time demand

Lead-time demand is still 40 units.

lead-time demand=40\text{lead-time demand}=40
Kanban scenario tableThe table compares the base safety factor with a zero-safety what-if.kanban scenariossafetylead demandallowanceprotectedcardsbase1/44010505zero safety0400404

Add safety allowance

Add safety allowance of 10 units.

safety allowance=10\text{safety allowance}=10
Kanban scenario tableThe table compares the base safety factor with a zero-safety what-if.kanban scenariossafetylead demandallowanceprotectedcardsbase1/44010505zero safety0400404

Protected demand

Protected demand is 50 units.

40+10=5040 + 10 = 50
Kanban scenario tableThe table compares the base safety factor with a zero-safety what-if.kanban scenariossafetylead demandallowanceprotectedcardsbase1/44010505zero safety0400404