Multiwinner Approval — electing a committee from approval ballots

The same Yes/No ballot, more than one seat — and a genuinely new question: should the committee maximize total satisfaction (utilitarian) or make sure every faction gets a voice (egalitarian/proportional)?

That is the multi-winner fork, in Approval clothing — the same decision a scored or ranked ballot faces, put in plain language at Electing more than one, simply. Its scored counterparts are Bloc STAR (majoritarian) and STAR-PR (proportional).

Start here → Approval Voting — Multi-Winner

The pages

• Approval Voting — Multi-Winner — the overview: bloc approval vs. the proportional (ABC) rules.
• Electing a committee — making sure people have a voice — the gentle intro to approval-based committee rules.
• ABC rules and the utilitarian–egalitarian spectrum — AV, PAV, seq-Phragmén and friends, placed on one axis.
• Thiele methods — the one dial that turns AV into CC, and where STAR-PR fits.
• Satisfaction Approval Voting (SAV) — the rule that sits beside the Thiele family: one vote per ballot, split among your marks. Disjoint from AV on the same ballots, clone-punishing where AV is clone-rewarding, and honest about its own failures..

Related

• Runnable multi-winner Approval elections: 04_Approval/02_Examples/multiwinner/ · proportional concepts: proportional representation