When an I-485 is accepted at the Service Center, requests for FD-258 FBI fingerprint checks, fingerprint fees, and G-325A consular background checks are made by USCIS. Responses to these requests come back to USCIS and must be matched up with the appropriate files held in staging. File Maintenance "file connects" these responses to the corresponding files.
My wife and I had our passports stamped after a 6 hour ordeal that started at 8:30 a.m. and ended at 2:30 p.m. Here are some tips based on what we experienced,
1. For an 8:40 appointment, get there before 8 if at all possible. They were not checking appointment timings, so people with 9/10 a.m. appointments were ahead of us in the line. All they care is that you have an appointment for that day.
In a welcome move, US government is showing some understanding of the economic benefits of business and employment-based immigration.
Secretary of Homeland Security Janet Napolitano and U.S. Citizenship and Immigration Services (USCIS) Director Alejandro Mayorkas have outlined a series of policy, operational, and outreach efforts to fuel the nation's economy and stimulate investment by attracting foreign entrepreneurial talent of exceptional ability or who otherwise can create jobs, form startup companies, and invest capital in areas of high unemployment.