Assigning users and groups to workflow actions makes them participants of the process. As participants, users and groups can only be involved in manual tasks, which require human interaction. Since actions represent steps in a process, you assign the participants needed to accomplish a particular action (task) by configuring the action's attributes.
If the workflow includes approvers or task recipients from different domains, a trust relationship must exist between the domains so that the users from both domains can log into the web application and complete their assigned tasks.
The Contact Picker dialog box is used to assign participants to the action. You need to select users or groups as the contact type to institute human participation.
You can configure an action to be approved by all designated approvers, or you can specify a percentage that must approve. You can also specify that the action may be approved by any of the designated approvers.
Note: Before you can assign participants in workflows, you need to have used the Database Utility to configure connections to local and/or domain users and groups. See "Configuring users and groups".