Mission problem
Sustainment planning is usually retrospective: consumption is reported after it happens, stock figures lag reality, and the first clear signal of a shortfall is often a unit that cannot move. Meanwhile the scheme of manoeuvre changes daily, and the routes that supply depends on carry their own, separately assessed, risk.
The staff problem is joining those three pictures, consumption, stock and route risk, quickly enough to re-allocate before a culminating point rather than after it.