In London, almost all journeymen artificers are liable to be called upon and dismissed by their masters from day to day, and from week to week, in the same manner as day-labourers in other places.
And if they are very complicated days that are logistically complicated, I would bring in more people, what we call day players, to just help on the day.
At street corners, day laborers try to organize a wage floor to prevent undercutting and warn workers of employers with bad reputations when they walk by.
Day laborers may just have a couple of minutes to negotiate their wages, hours and working conditions, all in competition with other workers and frequently with limited English proficiency.