Approval voting is a electoral system where each voter can support more than one candidate. The winner is the candidate with the most votes, or, in a multi-winner election, the top candidates with the most votes.
The arbitration committee election is a multi-winner election that uses approval voting. In its current form, voters can approve a candidate, disapprove a candidate, or abstain from expressing an opinion. Thus the election acts like multiple parallel approval votes on each candidate, where voters can opt out of submitting a ballot for a candidate. With different numbers of people voting on each candidate, winners are determined by approval percentage, which is calculated as approvals divided by approvals plus disapprovals. There is also a minimum percentage threshold that candidates must meet in order to win.
If you're not concerned about strategy to get your most preferred result over other results you still favour, or if you're not sure which candidates can possibly win: support everyone that you would be happy to see win. Oppose everyone else. This can mean supporting more candidates than the number of available seats. Your priority is to defeat all candidates you don't support. As per Approval voting#Strategy with cardinal utilities, not supporting X won't help them, so you'll never help someone you don't want to see win. However, another candidate who you prefer even less than X might defeat X.
If you feel certain about which candidates can possibly win:
Generally speaking, it's difficult to rule out any serious candidate as impossible to win. Therefore, support everyone that you would be happy to see win. Oppose everyone else. This can mean supporting more candidates than the number of available seats. Your priority is to defeat candidates you don't support. (You can vote neutral for any candidate where you don't mind if they win or lose.)
Approval voting is a electoral system where each voter can support more than one candidate. The winner is the candidate with the most votes, or, in a multi-winner election, the top candidates with the most votes.
The arbitration committee election is a multi-winner election that uses approval voting. In its current form, voters can approve a candidate, disapprove a candidate, or abstain from expressing an opinion. Thus the election acts like multiple parallel approval votes on each candidate, where voters can opt out of submitting a ballot for a candidate. With different numbers of people voting on each candidate, winners are determined by approval percentage, which is calculated as approvals divided by approvals plus disapprovals. There is also a minimum percentage threshold that candidates must meet in order to win.
If you're not concerned about strategy to get your most preferred result over other results you still favour, or if you're not sure which candidates can possibly win: support everyone that you would be happy to see win. Oppose everyone else. This can mean supporting more candidates than the number of available seats. Your priority is to defeat all candidates you don't support. As per Approval voting#Strategy with cardinal utilities, not supporting X won't help them, so you'll never help someone you don't want to see win. However, another candidate who you prefer even less than X might defeat X.
If you feel certain about which candidates can possibly win:
Generally speaking, it's difficult to rule out any serious candidate as impossible to win. Therefore, support everyone that you would be happy to see win. Oppose everyone else. This can mean supporting more candidates than the number of available seats. Your priority is to defeat candidates you don't support. (You can vote neutral for any candidate where you don't mind if they win or lose.)