Answer: Yes. This is a sustainable business model for Apple’s global supply chains
Explanation: The reasons for this being true is this:
1) The company manages the total value created in its global supply chains. It does this by effectively managing its suppliers and all other providers within the chains of supply.
2) Apple’s strong relationship with its network partners has helped increased the scaling of production which has resulted in the quality of their manufacturing processes greatly improving.
3) Apple's aggressive market leadership is supported by a supply chain infrastructure that has ensured exclusive supplier arrangements, predetermined expectations of suppliers, and guaranteed volume.
4) Apple focuses on its competitive advantage in the areas of product and features design and delegates hardware production to external partners hence, the company can focus all its resources to distinguishing its products from others in the market, while leveraging the power of external partners to improving the quality of its hardware.