Level 1 simply tries to capture the current-state processes for documentation, analysis, and eventual improvement. It uses the part of BPMN that is familiar from traditional flowcharting – swimlanes, boxes, and arrows – easily understood by the newly formed BPM project teams. Level 2 BPMN models created by process architects, business architects, and top-tier business analysts form the base activity flow layer on top of which IT layers the data model, business rules, and other implementation properties.