Usually the manager in a company is responsible for defining various approval procedures according the specific business needs. SAP Business One always does well to help people better, and more accurate, define this approval flow. In SAP Business One 9.2, we enhance the approval processes which will increase the efficiency of the work.
Go to Administration > System Initialization > Print Preferences, click Per Document and choose Sales Order, you may choose to block some action when Document is awaiting approval. This function will not only save the time, but also avoid false actions.
Furthermore, go to Administration > Approval Process > Approval Templates. You may define an approval process. In this case, the use who is subject to approval process will start the template in selected documents.