Stockout count is exact subtraction from demand.

highlighted = computed this step

Subtract filled units

Stockout units are demand minus filled units.

stockout=demandfilled\text{stockout}=\text{demand}-\text{filled}
Initial fill and stockoutThe chart separates initially filled units from stockout units.initial fill and stockoutfill rate 21/25; stockout rate 4/25initialfilled 42stockout 8after backorderfinal filled 47later filled 5; remaining stockout 3measurevalueratedemand50filled4221/25stockout84/25final filled4747/50remaining stockout3deterministic service snapshot arithmetic only

Stockout units

Stockout units are 8.

5042=850 - 42 = 8
Initial fill and stockoutThe chart separates initially filled units from stockout units.initial fill and stockoutfill rate 21/25; stockout rate 4/25initialfilled 42stockout 8after backorderfinal filled 47later filled 5; remaining stockout 3measurevalueratedemand50filled4221/25stockout84/25final filled4747/50remaining stockout3deterministic service snapshot arithmetic only