Does planned stock mean a target, or a reserve before shipping out?

It affects both receiving demand and stock retained at the source. Ordinary storage transfers usually take only unreserved surplus above the source's plan. Manual shelf replenishment initially triggers when stored stock plus incoming goods is strictly below 80% of the plan: a plan of 100 triggers at 79, but not 80. Fixed-route unloading uses its own stop rules; the 80% test is not universal.