The final lesson states the boundary: this is deterministic service snapshot arithmetic.

highlighted = computed this step

Deterministic snapshot

The calculations use fixed demand, on-hand units, and a fixed later-filled amount.

deterministic service snapshot arithmetic\text{deterministic service snapshot arithmetic}
Backorder what-ifThe chart shows the initial snapshot and a later-filled backorder what-if.backorder what-iffill 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

Not service level

This is not a stochastic service-level or demand-distribution model.

outside scope: stochastic service level and demand distribution\text{outside scope: stochastic service level and demand distribution}
Backorder what-ifThe chart shows the initial snapshot and a later-filled backorder what-if.backorder what-iffill 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

Not policy proof

This does not prove lead-time uncertainty, lost-sales policy, forecasts, or customer behavior.

outside scope: lead time, policy, forecast, behavior\text{outside scope: lead time, policy, forecast, behavior}
Backorder what-ifThe chart shows the initial snapshot and a later-filled backorder what-if.backorder what-iffill 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

Honesty note

This is deterministic service snapshot arithmetic only. It does not model stochastic service levels, demand distributions, lead-time uncertainty, lost-sales policy, forecasts, or customer behavior.

deterministic service snapshot arithmetic only\text{deterministic service snapshot arithmetic only}
Backorder what-ifThe chart shows the initial snapshot and a later-filled backorder what-if.backorder what-iffill 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