Final answer:
Delta Airlines strategists likely examined the global value chain as the second step during their international expansion into Thailand to determine how to integrate their services into the worldwide market effectively.
Step-by-step explanation:
The second step in the international expansion process followed by Delta Airlines strategists when expanding service into Thailand likely involved examining the company's global value chain. This examination would include looking into how the service could be integrated into the existing sequence of processes needed to deliver a product or service to the global market, which can be seen in examples like the production of the iPhone. The global value chain encompasses designing in one country, sourcing parts from another, assembling in yet another country, and then marketing globally. This approach helps companies like Delta Airlines leverage various countries' specializations and establish a presence in new markets such as Thailand more effectively.