Challenge Scenes

Fate Core describes the challenge structure:

A challenge is a series of overcome actions that you use to resolve an especially complicated or dynamic situation. Each overcome action uses a different skill to deal with one task or part of the situation, and you take the individual results as a whole to figure out how the situation resolves.

While many challenges will take place in a single scene, some situations may stretch out over multiple scenes. If you are running a challenge like this, run scenes like you normally would. Characters perform whatever actions the need to during these scenes, and you can even work contests or conflicts in where they make sense.

If characters make overcome actions during the scene and succeed with style, players can bank the boosts generated rather than spending them right away. At the end of each scene, one player makes the overcome action required for the challenge. They can use any banked boosts on this action to influence success in the challenge.

Combine this idea with Ordered Challenges and you can structure entire adventures as challenges. If you do, consider going the route of Fate Accelerated Edition and drop the requirement for each stage of a challenge to use a different skill.