A project manager leads a critical business transformation to add a mobile module to a desktop application. Marketing believes a key competitor is developing a similar product. Which delivery approach should be used?

Incremental delivery is the most suitable approach because it focuses on delivering usable portions of the product in short cycles. This allows the mobile capability to be released quickly, addressing the competitive pressure and providing value to users sooner. While Extreme Programming (XP) is agile and mitigates risk, incremental delivery specifically emphasizes rapid release of functional components. Traditional delivery would be too slow given the competitive threat. Iterative delivery focuses on refining a single product through multiple cycles based on feedback, but incremental delivery prioritizes getting a working piece out to market faster.