After releasing a general overview of Call of Duty’s complicated matchmaking process earlier this year, Activision is now going into granular detail on the factor it prioritizes most: ping. The deep dive is the first of four promised white papers on the subject, with Activision committing to sharing its approach with industry peers.

As revealed in January’s outline, the most heavily weighted factor in Call of Duty’s matchmaking is ping–the time it takes for data to travel from a player’s game to the server running it. High ping can result in a bad gaming experience, with other players seeming to warp or teleport, or missing shots that appeared to be accurate.

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