Flexible Business Workflows
SAP Business Workflow can be used to define business processes that aren't supported by the SAP standard processes in SAP Signavio Process Navigator. This could be a simple release or approval procedure, or a more complex business process. SAP Business Workflow is especially beneficial for situations where work processes have to be run through repeatedly, or in situations where the business process requires the involvement of a large number of responsible people (agents) in a specific sequence. It can also be used to respond to errors and exceptions in other existing business processes - for example, a workflow could be triggered when a predefined event occurs.

SAP provides many workflow scenario templates that can be used by partner LoB configuration experts to resolve a customer requirement identified during Fit-to-Standard workshops. Many different function-specific apps exist to maintain workflows in different areas. To view and edit the predefined workflow scenarios, or create and maintain custom approval workflows, you open the function-specific workflow app and follow the instructions in the SAP Help Portal to define a workflow here. A workflow consists of individual work items, which are the tasks assigned to agents to complete. The task describing what needs to be performed in a workflow step to which a user is assigned displays in their My Inbox app.
Watch a video
Watch this video for an example of how to set up an approval workflow for sales prices.
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Follow this topic in the SAP Community - SAP Business Workflow.
Alternatively, remember that the customer has a license to SAP Build Process Automation through their GROW with SAP enablement package. SAP Business Workflow in SAP S/4HANA Cloud uses the engine, SAP Workflow Management to run business processes. SAP Build Process Automation is an evolution of the previous standalone solutions SAP Workflow Management and SAP Intelligent Robotic Process Automation (RPA). It brings both Workflow and RPA into one product that runs on the SAP Business Technology Platform and provides a low/no-code user experience with additional capabilities (e.g. building cross-product workflows) beyond the flexible workflows that can be built within SAP S/4HANA Cloud. Consider which option would be most efficient to set up, and easiest to maintain for the customers in the future when evaluating which tool to use to build custom workflow scenarios.
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Follow this topic in the SAP Community - SAP Build Process Automation.