| B | ↘ | C | Subscription got worse |
| ⇢ | B | Subscription.modify_monitored_item() added | |
| ⇢ | A | MonitoredItemService.deadband_callback() added | |
| ⇢ | A | Subscription.deadband_monitor() added | |
| ⇢ | A | Subscription._modify_monitored_item_request() added | |
| ⇢ | A | modify_monitored_item_low() added | |
| A | ↘ | B | MonitoredItemService.datachange_callback() got worse |