The combination of agile and traditional practices is important for greater innovation in New Product Development (NPD). This paper analyzes ten combination proposals found in the literature, using the systematic bibliographical review method. Four of them did not show features associated with the combination. Four proposals recommend using agile project management associated with NPD process. Two proposals recommend using a general project plan, prepared through Work Breakdown Structure, scheduling, and integrated with agile iteration planning. The evaluation of these proposals indicated a shortage of recommendations and revealed two classes of combination strategies, namely bottom up and top down.