The write-up is entirely fiction and speculation, based on observations made in the two production runs of the related anime.
More than one hundred-strong, the Hanaukyo Maid Tai represents a large group of specialists, maids, nutcases, those who seriously require medical attention and hard workers all dedicated to serving the master. To help maintain the effectiveness of the mansion, a minor rank system has been established and a small group of maids put in charge over certain areas which are now Departments.
Grades 1-3, the recruits and newer trainees.
Not many maids at the mansion are wearing these ranks, since trainees are usually given up to about a year before they are promoted to full Maids. Trainees usually work under supervision and are rarely assigned any heavy duties, to ensure they ease their way into the system with as little stress as possible.
1 - Maid Trainee
2 - Assistant Maid, 2nd-Class
3 - Assistant Maid, 1st-Class
Grades 4-6, the "Maids"
These ranks represent the majority of the maids who have developed experience in the household and are quite capable of performing their duties independently, with little or no supervision of the Department Head.
4 - Maid, 3rd-Class
5 - Maid, 2nd-Class
6 - Maid, 1st-Class
Grades 7-9, the "Specialists"
Most Specialists in the household are often the Department Heads or Assistants and can effectively operate, supervise and perform their duties with expedience. Specialists have considerably more contact with the Master than most of the other maids in the household. In addition, some departments require additional Specialists to help increase the effectiveness of the department. Security would be one such example, given the rigorous training the department goes through.
7 - Specialist
8 - Senior Specialist
9 - Chief Specialist (Reserved for no more than 2 maids in the entire household)
Grade 10, the "Maid of the Household"
This Grade only ever applies to one maid, and usually operates under the Standard Duties department, dawning the blue maids' uniform. The Maid of the Household has the most contact with the master, and is also responsible for the overall operation of the household. She is also responsible for recruiting, terminating employment and directing the overall duties and assignments of the maids and household. All Department heads report to the Maid of the Household on a regular basis. In the event there is no Maid of the Household or due to absence, these duties fall upon the next ranking maid in the household, regardless of department.
10 - Maid of the Household
With the exception of the small Nursing Department, all Department Heads require a minimum rank of Specialist (#07). The Department Heads are often the liasons between the master and the rest of the maids in the household. They co-ordinate with the rest of the maids and ensure the necessary tasks for the day have been completed. Department Heads also wear the alternate uniform so other maids will easily be able to determine which maids are in charge of the departments.
Within the Hanaukyo Mansion, there are six maid Departments, each with their own specific duties to help maintain the overall effectiveness of the mansion. Below are the listed Departments and uniform busts they maids generally wear. Generally, the uniforms are long-sleeved with the dress reaching down to about three-five inches above their feet.