Smyrna Strawberry Inc. wants to know what the three key assumptions of the theory of constraints are, so they can increase the speed of their product line. What do you tell Smyrna? What needs to be changed, what should it be changed to, what actions will cause the change Unit contribution margin per bottleneck hour, profit maximization, exploiting constraints Throughput, Operational Expense, Inventory Internal Constraints, External Constraints, Bottlenecks