What-If and Scope

Zero-Safety What-If

A smaller safety factor gives a smaller deterministic card count in this pinned example.

highlighted = computed this step

Zero safety factor

With safety factor 0, there is no safety allowance.

safety factor=0\text{safety factor}=0
Safety-factor comparisonThe chart compares the base policy safety factor with a zero-safety what-if.safety-factor comparisonlead-time demand 20 x 2 = 40safety allowance 40 x 1/4 = 10protected demand 50; container 10base: protected 50K1K2K3K4K55 cardswhat-if 1: protected 40K1K2K3K44 cardscasesafetylead demandsafety allowanceprotectedcardsbase1/44010505what-if 10400404deterministic sizing rule with a policy safety factor

Protected demand

Protected demand drops to 40 units.

protected demand=40\text{protected demand}=40
Safety-factor comparisonThe chart compares the base policy safety factor with a zero-safety what-if.safety-factor comparisonlead-time demand 20 x 2 = 40safety allowance 40 x 1/4 = 10protected demand 50; container 10base: protected 50K1K2K3K4K55 cardswhat-if 1: protected 40K1K2K3K44 cardscasesafetylead demandsafety allowanceprotectedcardsbase1/44010505what-if 10400404deterministic sizing rule with a policy safety factor

Cards

The zero-safety what-if needs 4 cards.

cards=4\text{cards}=4
Safety-factor comparisonThe chart compares the base policy safety factor with a zero-safety what-if.safety-factor comparisonlead-time demand 20 x 2 = 40safety allowance 40 x 1/4 = 10protected demand 50; container 10base: protected 50K1K2K3K4K55 cardswhat-if 1: protected 40K1K2K3K44 cardscasesafetylead demandsafety allowanceprotectedcardsbase1/44010505what-if 10400404deterministic sizing rule with a policy safety factor