It's just an industry retooling, as long as it is on top of the building queue system will pour it's industry into dust. You can cancel it at any moment.

It's an infinite action for systems that you don't want to manage if you have too many of them already, it converts the entire industry of the system to 25% as much dust as long as it's running. And you can indeed cancel it at any moment.

I think OP asks if you can change it to improvement akin to Hissho Observances, where once you build it, it places temporary buff on your system and does not occupy production queue for that time.

It's still simpler) The idea is for the star system to process the industry into dust for 5 or 10 turns. And then I built a cruiser or Denark