Process mining is a data mining tool and technique with a specific focus on using systems data to create accurate process maps and models. This helps to identify process fiction, log jams, inefficiencies, non-compliance. It also helps with applications, cloud migrations and upgrades by identifying process debt where legacy processes are no longer needed. Process mining tools are comprehensive data mining tools that capture the process data and allow detailed process models to be created and tested against theories. Process miners talk about upstream and downstream tasks and events. These can be visualised and when changes are made, the observer can witness what happens when process elements are changed to both the upstream and downstream elements of the process. Does it speed up slow down, add value or take value away? The process mining can identify the time taken for a task and observers can enter hourly costs against the person undertaking the task. Full costs are then applied to the process so any changes are fully costed and shown. Once understood process can be changed through process tuning or part or full automation.