Here are the procedures.
1) The Local Field Office fills and prints out the copy 3 of the Form I-181(Memorandum of Creation of Record of Lawful Permanent Residence) and completes the processing. I am informed that a I-181 welcome letter is sent at this stage. Your status will be changed to “Completed.”
2) Copy 3 of Form I-181 will be sent to one of the five green card production printer facility (there is six printer devises but one only do EADs) called "ICPS (Integrated Card Production System) printer devises" located in Kentucky, Nebraska, or Vermont for issuance of the plastic card. None in California-high costs to manufacture there I presume. This information is from a GAO 03-135 report (Nov. 2002) regarding ICPS so I think it is up-to-date. Then your status will change to “Card Ordered.”
3) After the card is manufactured in one of these facilities. Then your status should change to “Card Mailed.” The ICPS facility probally does not have your I-485 file, so its important that AR-11 is done when you change address or the ICPS printer devises will mail it out to your former address in the national computer.