What is the name of the theoretical scenario involving Jupiter forming farther out and migrating inward less aggressively?

The "Grand Tack."

The "Grand Tack" refers to a specific theoretical model suggesting a possible evolutionary path for Jupiter that differs slightly from the history inferred for our current system. This model posits that Jupiter initially formed farther out in the solar system before migrating significantly inward toward the Sun, and subsequently migrating back outward to a more distant position. The significance of this scenario is that a less aggressive inward migration might have delivered sufficient water and volatile materials necessary to wet the early Earth, while simultaneously avoiding the extreme orbital destabilization of Mars and Earth that a more extensive initial migration might have caused. This suggests a giant planet is needed, but perhaps one with a history subtly different from our own Jupiter's observed trajectory.