The process will effectively begin when the rules committee of the Democratic National Convention meets on a video call at 11 a.m. on Friday, followed by another party group on Sunday. All of the more than 4,000 delegates are expected to begin casting their ballots as soon as Monday, a process that is likely to take about a week. After that, the committee is expected to quickly hold the roll call, a tradition that typically occurs on the convention floor but is being held virtually this year.