supplier { # Supplier
  n1: circle label:"Start Reverse Logistics"
  n2: diamond label:"Receive Reverse Logistics request"
  n4: rectangle label:"Make Reverse Logistics decision"
  n7: rectangle label:"Continue Reverse Logistics process"
  n10: circle label:"End Reverse Logistics"
  n1.handle(right) -> n2.handle(left)
  n2.handle(bottom) -> iot_sensor.n3.handle(top) [label="Yes/Approved"]
  n4.handle(bottom) -> warehouse.n5.handle(top)
  n7.handle(bottom) -> warehouse.n8.handle(top)
  n2.handle(top) -> n4.handle(top) [label="No/Rejected"]
}

warehouse { # Warehouse
  n5: rectangle label:"Update records for Reverse Logistics"
  n8: rectangle label:"Continue Reverse Logistics process"
  n5.handle(bottom) -> iot_sensor.n6.handle(top)
  n8.handle(bottom) -> iot_sensor.n9.handle(top)
}

iot_sensor { # Iot_Sensor
  n3: rectangle label:"Review Reverse Logistics details"
  n6: rectangle label:"Continue Reverse Logistics process"
  n9: rectangle label:"Continue Reverse Logistics process"
  n9.handle(right) -> supplier.n10.handle(bottom)
  n6.handle(right) -> supplier.n7.handle(left)
  n3.handle(left) -> warehouse.n5.handle(left)
}