How navies balance stored supplies and continuing orders

How is a navy's logistical capacity managed: through stockpiles, continuing orders, or both?

Both: build an emergency reserve, then sustain it with continuing production adjusted to usage, though missiles are harder to replenish than commercial-type spares.

Navies generally establish a reserve through a large initial order and then maintain a continuing flow roughly matched to expected consumption. Commercial markets can support many engine spares, while missiles lack the same production depth, making weapon stockpiles harder to replenish quickly. The stored quantity covers emergencies while replacement orders keep routine use from drawing the reserve down. The discussion also points toward drones as a category where a broad commercial market may initially offer more surge capacity than specialized naval weapons.