Final answer:
The supply chain capacities range from 35,000 boxes/week at the processing plant to 30,000 boxes/week at the warehouse, with the warehouse being the bottleneck due to its lowest capacity.
Step-by-step explanation:
The capacity of each member in Company B's powdered milk products supply chain is as follows:
The processing plant can produce 35,000 boxes/week (5,000 kg/day * 7 days/week / 0.9 kg/box), each packing area can handle 17,500 boxes/week (250 cases/day * 10 boxes/case * 7 days/week), the transport company can deliver 5,000 cases/week (5 trucks * 50 cases/truck * 2 trips/day * 5 days/week), and the warehouse can handle 3,000 cases/week.
The bottleneck in this supply chain is the warehouse, due to its lowest capacity limit which is 3,000 cases/week or 30,000 boxes/week. The bottleneck in the supply chain is the packing areas, as they can only form up to 17,500 boxes/week, which is lower than the capacity of the processing plant (35,000 kg/week) and the warehouse (3,000 cases/week).