This article is from the FAQ, by with numerous contributions by others.
This is a much simplified flow chart. Variations exist.
o Prepare a job description for the job being offered.
o Job must be "permanent".
o Alien must be paid at least the minimum wages prevalent
for the job in the geographical area of employment.
o You need to advertise the job for 10 business days in your office
o Advertise for 3 consecutive days in a LOCAL newspaper or one day
nationally.
DOL [dept. of labor] will send in all the responses they get
for your advertisement and your employer needs to justify why
you are better than other applicants. If the DOL doesn't approve
your labor then you can't apply for labor clearance for the next
6 months.
 
Continue to: