Swimlane flowchart is a special chart to show the relationship between a business process and the functional units (such as departments) responsible for that process. It focuses on the logical relationship of the value activities and can better show the responsibility for each.
Department Dimension should be divided by the department or responsibility. Point out which department is in charge of completing the activity.
Phase Dimension should be divided by the task stages. Each process is consisted with the different stages.
Activities within each grid should be implemented by the department at that stage.
With the professional flowchart software, it's easier to draw the swimlane flowchart. You needn't to take care of the drawing skill but only understand how to draw the swimlane.
To add the swimlane units to an existing flowchart, drop cross-functional shapes onto the page and then place the process steps in the lanes. The cross-functional shapes locates in the Cross-Functional Horizontal template and Cross-Functional Vertical template.