SAP Ariba modules provide easy to use workflow designs that do not need customization by technical experts. It provides preconfigured workflows based on best practices that you can use right way. With the use of drag-drop functionalities, you can easily modify rules and with the use of workflow builder, users can easily build, test and deploy workflows.
https://www.ariba.com/solutions/solutions-overview/financial-supply-chain/invoice-management
There are different configuration workflows that can be used.
From the same link, you can check other existing configurable workflows in Ariba solution −