This paper contrasts two theoretical models for firms' achieving fast adaptation through product innovation. The compression model assumes a well-known, rational process and relies on squeezing together or compressing the sequential steps of such a process. The experiential model assumes an uncertain process and relies on improvisation, real-time experience, and flexibility. The two models are tested using data from 72 product development projects drawn from European, Asian, and U.S. computer firms. The results indicate that using an experiential strategy of multiple design iterations, extensive testing, frequent project milestones, a powerful project leader, and a multifunctional team accelerates product development. In contrast, the compression strategy of supplier involvement, use of computer-aided design, and overlapping development steps describes fast pace only for mature industry segments. The results also show that planning and rewarding for schedule attainment are ineffective ways of accelerating pace. We conclude with linkages to punctuated equilibrium and selection models of adaptation, fast organizational processes, organic versus improvisational structures, and complexity theory.