On Friday, the Bureau of Labor Statistics released a jobs report that upended the narrative pundits, journalists, government officials, and the White House had been repeating for months: The economy is doing just fine.

How exactly does the BLS assemble the critical jobs report? And what is the commissioner’s role? Here’s what we know.

Revisions are a normal part of the jobs report process. After the report comes out, revisions are later released to include additional information not available at the time of the initial release. For example, survey participants may not respond to the initial deadline.