There is no single best AI tool for every mechanical engineering team. The right fit depends on where work slows down, such as finding prior design context, creating CAD concepts, running simulations, reviewing drawings, checking manufacturability, or navigating PLM data. For teams focused on review and release, the highest value AI workflows are usually the ones that already have strong engineering context behind them, including CAD models, drawings, standards, checklists, supplier feedback, and lessons learned.