The BVC does not change the steps in the visa process in any way. The BVC is an information portal for U.S. based businesses. U.S. Embassies overseas continue to have the responsibility under immigration law for the acceptance and processing of visa applications, and decisions about issuance of visas for foreign citizens to travel to the U.S.
As examples, a visa applicant must still apply (or if desired, reapply, if denied), at a U.S. Embassy overseas and follow the visa application procedures.