Without knowing current packaging quantities, delivery success, product loss and the return path, there is no way to measure what the new system improves.

FieldWhat is recorded
Product flowroute, temperature condition, period
Single-usequantity, rejection cause, product loss
Container servicefilling, delivery, empty return, readiness again (by ID)
Return pathreturn points, wash capacity

Pick one flow with known boundaries and compare the two methods over the same service unit and period. If the return and cleaning steps are undefined, buying durable containers does not complete the switch.