For long-range search, the scout bees regularly look for new locations and investigate each new area for at least t rounds (where t is the hyper-parameter controlling the number of retry before becoming a scout bee).
in the Swarm Summarizer, the mid-range search is limited compared to the reproduction mechanism, because it is achieved only by either successfully applying several local movements, or by randomly scouting the mid-range areas, both of which are unlikely.