The complexity of a process proposed for automation is most influenced by the number of steps involved. A higher number of steps typically indicates a more complex process, as it may involve multiple decision points, variations, and interactions with different systems or applications. Complexity can be defined by factors such as the number of applications/systems, the frequency of human intervention, or the number of steps required to execute the task1. Processes with fewer steps are generally easier to automate because they are simpler and have fewer variables to manage during the automation.
References: The explanation is based on the UiPath blog post discussing factors that influence the complexity of processes for automation1.