What three steps did a person complete to become a master in a guild?

The steps to becoming a master in a guild started with apprenticeship, working for a guild master for a number of years in exchange for food, a place to sleep, and education.

The next step was to be a journeyman, working at the trade for a number of years, usually as a paid employee of a different master.

Finally, the journeyman prepared a "masterpiece," which was designed to show off his skill. The masterpiece was judge by a jury of masters of the guild, and if they agreed that it showed mastery, then the journeyman would be a master.