Processes are run in a preset sequence or workflow using a process engine. For the process engine to function, a process/workflow must exist. Each processing activity and each connector inside the process are executed one by one by the engine, and the relevant work step is completed. Humans or robots can execute the actions that occur during the execution of a process. There must be communication between the process engine and the machine's software in order for the machines to do their jobs. Human interaction workflows are processes that are carried out by both humans and machines.
Process engines are technically applicable to any process that can be automated. Automation, on the other hand, is best suited for procedures that repeat themselves on a regular basis. In an SAP system, for example, it is not essential to utilize a menu tree or transaction numbers to move from the screen for making an order to the screen for creating an invoice—a process engine may be used to automatically navigate from screen to screen for tasks like creating an invoice. The navigating becomes significantly easier as a result of this.