A Mender (VWCP) shares each week among three or four very different jobs, and no two of the jobs belong to the same world. A world, on this site, is a work environment such as a farm, a council or a college, and the people and habits of one seldom turn up in another.
A sheep farmer spends four days a week with the flock, takes the chair at the parish council’s monthly meeting and studies law two evenings a week. The council pays nothing and the law course costs money, and on this site both count as roles.
The farmer can take a question about grazing rights to a councillor and a question about a lease to a law tutor, two people the flock alone would not have brought. The mix also widens what the farmer can do, and every new role gives more practice at being new somewhere.
Competence keeps each of the farmer’s roles at a level that needs no catching up after a week away, so the farmer can turn from lambing to a council agenda without a backlog. However, when one world raises what it asks, such as a council taking on a planning dispute, the extra hours come out of the other two roles.