I'm new to "Whist" schedules, but if it's what I'm thinking, I run those tournaments often, where you have a larger number of teams than a single day will allow for all of them to play against each other. What I do is randomize which teams play against each other whilst putting a "cap" on how many games we have the time to play. As a result, if there are 16 teams, each team will get to play against either 4, 5, 6 or 6 of those teams (randomly selected)...depending on how much time is available.
Nathan