Suriawase (すり合わせ): rubbing together. Comparing several proposals or opinions and adjusting them to one another. A dictionary of everyday expressions adds: adjusting the differences in people’s opinions and perceptions until they share an understanding and a direction.
Jinarashi (地均し): leveling the ground. Preparing in advance so that something goes smoothly, as in iken chōsei no jinarashi o suru, leveling the ground for coordinating opinions.