Final answer:
A project-based alliance is formed between Hard Rock Cafe International and Sol Melia Hotels and Resorts to develop a hotel, ending upon completion.
Step-by-step explanation:
The relationship between Hard Rock Cafe International and Sol Melia Hotels and Resorts to develop a multimillion-dollar hotel is termed a project-based alliance. This type of partnership is characterized by a collaboration that is designed to achieve a specific goal and is limited to the duration of the project. Once the hotel is completed, the alliance is likely to be dissolved unless both parties decide to extend their partnership for future projects or other business purposes.