On a list on your SharePoint site, on the ribbon, click the Library tab.
In the Settings group, click the lower half of the Workflow Settings button.
On the menu that appears, click Add A Workflow.
If the workflow contains an initiation form (by which the person assigning the workflow can change certain workflow behaviors), the user will see a Next button displayed on the Add A Workflow page instead of an OK button. This Next button takes the user to another form on which workflow behavior can be changed.
On the Add A Workflow page, choose a workflow to associate with the list.
Assign a local name for the workflow that will be displayed to users.
Choose the lists that will hold related workflow tasks and history.
Typically, the default values can be used, and these lists will be automatically created.
Choose the workflow starting options.
You can configure this workflow to automatically launch on certain events, if needed.
If additional, workflow-specific data is required, a Next button displays. Click the button, and enter any required information on the next page. Otherwise, an OK button is available. Click this button to save your settings.