A Process Flow has been designed that routes an assignment to a HR manager. An additional requirement is that the HR Manger be able to attach a budget sheet to the assignment before approving the assignment. This can be accomplished using a:

Local Flow Actions in Pega allow users to perform additional actions on an assignment without completing it. Actions like attaching documents, updating fields, or adding notes can be performed before the main approval action. This is the standard mechanism for enabling users to attach budget sheets while keeping the assignment open for approval.