Awards results are usually discussed in terms of merit and campaigning. The mechanics of who votes and how the votes are counted explain at least as much about the outcome.
The electorate is defined by craft
Most industry awards are decided by members organised into branches, with each branch nominating in its own field.
Editors nominate editors and composers nominate composers, so a nomination reflects the judgement of a few hundred specialists rather than the whole membership.
The final round usually opens to everyone, which means the people who choose the winner in a technical category are largely not the people who chose the nominees.
Nominations and wins are counted differently
Nominating rounds often use a preferential system in which voters rank choices and a threshold determines who advances.
That system rewards concentrated enthusiasm: a work adored by a minority can secure a nomination that a broadly liked but rarely first-ranked work misses.
Final rounds in most categories are decided by a simple plurality, which rewards the opposite quality, and the shift between the two explains many surprising results.
The top category often uses a different method
Where a best picture equivalent is decided by ranked preferences, a winner needs support beyond first place to reach a majority.
Second and third preferences are redistributed until something clears the line, so an inoffensive consensus choice can beat a divisive favourite.
This is the structural reason a film can win the most individual categories and still lose the main one.
Eligibility rules quietly shape the field
Awards set requirements on release windows, exhibition length and territory, and works that miss them are simply not considered.
Those rules have been revised repeatedly as distribution has changed, and each revision alters which productions can compete in a given year.
Studios plan release dates around eligibility as much as around audiences, which is why certain kinds of film cluster in particular months.
Campaigning targets voter attention
Voters are asked to assess a large number of works in a short window, and few see everything.
Campaigns exist to make a title one of the ones actually watched, through screenings, viewing links and events that put a film in front of the electorate.
Awarding bodies regulate this to limit direct solicitation, but attention remains the scarce resource, and the contest for it is a real part of how outcomes are determined rather than a sideshow attached to it.