State Budget Office
Welcome to SIGMA, the State of Michigan’s business operations system. If you are a local municipality or authority, school district, community college, or university, you are in the right place.
SIGMA provides user-friendly experiences for solicitations or SIGMA Vendor Self Service (VSS) when submitting proposals.
Please review the links below to determine which information is most relevant to you for use with SIGMA.
Local Entities Tutorials
The system is available from 8 a.m. - 6 p.m. Monday through Saturday. The system closes nightly for batch processing at 6 p.m.
Bids are synced to the public VSS website every 2 hours during the work day starting at 8 a.m.
Check back for additional information and frequent updates.
Municipalities, schools, universities and other local entities that would like to submit a response to a state business opportunity should follow the vendor directions located here