Few, if any, get all of it. The people in the process share the wins and losses. Another family of processes has very different qualities. These processes try to satisfy all parties. Sometimes there is enough agreement between people to provide quick outcomes that are good for all.
Consensual processes can then yield easy and satisfying decisions.
But sometimes this form of consensus does not work. Some decisions can't be made using those consensual processes which focus on agreement. A third family of processes is often regarded as part of the consensual family. The differences are so great, however, that this may be a poor categorisation. I'll call them dialectic processes.