SharePoint Foundation 2010 workflows are made available to
end-users at the list or document-library level. Workflows can be added to
documents or list items. Workflow can also be added to content types.
Multiple workflows may be available for a given item.
Multiple workflows can run simultaneously on the same item, but only one
instance of a specific workflow can run on a specific item at any given time.
For example, you might have two workflows, called “SpecReview” and “LegalReview”,
available for a specific content type, Specification. Although both workflows
can run simultaneously on a specific item of the Specification content type,
you cannot have two instances of the “LegalReview”
workflow running on the same item at the same time.
Workflow forms: