On the question of when to settle for a target in the Comet Interceptor mission

The Comet Interceptor (CI) mission, planned for launch in 2029, will ideally involve a flyby of a dynamically new long period comet or an interstellar object passing through the inner solar system. Powerful ground based facilities like the Vera C. Rubin Observatory Legacy Survey of Space and Time will aid in the search for a potential target. The CI mission includes a parking phase at the Sun-Earth L2 point and the target may in fact still be unknown by the time of launch. The question on when to settle for a target is complex. For instance may arise the question of how long time it is motivated to await with a final decision given the chance that a better target may show up if just waiting a little bit longer. We present expectation value-based formalism that could aid in decision making of such kind.