AT:

• I can evaluate the duration between two flow nodes grouped by variable using the REST-API
• The view needs to be set to process instance duration and the groupBy set to varialble
• The duration states the time from the start of the first flow node to the end time of the second flow node
• If there are more instances of the start flow node and end flow node, the following algorithm applies to fetch the correct instances:
  • select the youngest start flow node instance
  • find the end flow node instance, which has the closest start time to the start flow node instance