The initial plan had been for the first fab to achieve full production this year, but the timeline was delayed due to several workforce challenges. These included difficulties in finding skilled workers locally, cultural differences between TSMC's Taiwanese management and American employees, and a shortage of skilled construction workers that slowed the building process. This delay raised concerns about TSMC's ability to maintain efficiency with its US operations compared to its facilities in Taiwan.

Recent success in trial production has alleviated some of these concerns. TSMC has confirmed that the Arizona project is progressing as planned, although the company has not commented specifically on yield rates.