I do have month by month rules for resolving operations using an event card based system that I’ve already written and play tested that I shelved because I didn’t see how it fit into the game. I think that’s probably what you’re looking for; I think it’d fit best in the “trading a crew for their first human interplanetary space flight” rules I’m planning for the Re: Crewed Rules.
I've dug these up and have ended up starting to rewrite them, inspired in part by https://knightattheopera.blogspot.com/2025/06/seven-part-pact-time.html