Final answer:
Interfacing is the primary relationship activity in strategic alliance building that involves creating personal connections along with business interactions.
Step-by-step explanation:
The primary relationship activity in building strategic alliances that involves facilitating the creation of personal relationships at many levels, traveling to partner facilities and engaging in technical conversations, and blending social and business time is interfacing.
The primary relationship activity in building strategic alliances that involves facilitating the creation of personal relationships at multiple levels, travelling to partner facilities, engaging in technical conversations, and blending social and business time is Interfacing. This stage is all about making connections that go beyond just business, fostering the personal rapport required for a successful alliance. It requires effective communication and often includes informal interactions that help to build trust and understanding.