Learn Spanish (Latin America): En resumen, el proyecto salió bien.

Yes! While es decir and o sea are used to clarify or rephrase something (meaning "that is to say" or "in other words"), en resumen is a connector used to wrap up or summarize what was just said (meaning "in summary" or "in short"). They are all helpful conversational glue used to organize your thoughts.

Doesn't salir usually mean "to leave" or "to go out"? Why is it translated as "turned out" here?

That's right, the most common meaning of salir is to leave or go out. However, when you pair it with words like bien (well) or mal (badly), it means "to turn out" or "to work out." So, salió bien simply means it turned out well.

Could I use the verb ir (to go) here instead of salir, like el proyecto fue bien?

Yes, you can! Saying el proyecto fue bien (the project went well) is perfectly natural. Using salió bien, however, puts a little more focus on the final result, emphasizing how the project wrapped up in the end.

Why is it bien and not bueno at the end of the sentence?