| Area | Microservice | Gaps Identified | Criticality | Why Important | Recommended Actions |
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| Device | OPC UA | Missing | | New installations of SCADA systems are typically expected to be compliant with the OPC UA standard |
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| Device | OPC DA | Missing | | Although OPC UA is an emerging standard, E&P Companies are still massively using OPC DA in legacy systems and in some cases in new installations as well |
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| Device | Modbus | Seems like the current Modbus implementation is querying 1 register at a time on the Modbus Slave. Modbus requests should be grouped together requisting multiple registers with a single call. | | Sending too many requests is invasive on the PLC which needs to conserve CPU cycles to perform its control duties |
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| Device | Zigbee | Missing | | Wireless sensors are slowly gaining traction for non-critical measurements as wiring can be tough in certain constrained environments. Zigbee would be a good option. |
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| Device | LoRa | Missing | | Wireless sensors are slowly gaining traction for non-critical measurements as wiring can be tough in certain constrained environments. LoRa would be a good option. |
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| Device | GPS | Missing | | Could a GPS DS serve to get the coordinates (lat/long - 2 floating point metrics) from the gateway? |
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| Device | Profinet | Missing | | Siemens hardware is used in many Oil&Gas installations (e.g. North Sea) and Profinet I/O would be a suitable protocol for interfacing with EdgeX |
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| Device | DDS | Missing | | DDS is used in drilling for data messaging on critical items |
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| Core | Data |
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| Core | Metadata |
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| Core | Command |
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| Support | Rules Engine / Analytics |
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| Support | Scheduling |
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| Support | Alerts & Notifications |
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| Support | Logging | Need to be able to specify persistency policies for type of logs |
| Different logs are required for liability purposes and can be assessed in case of incidents |
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| Export | Client Registration & Distribution | Missing mechanism for backfilling historical data. (perform an export job from start-timestamp to end-timestamp). |
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| System | System Management | Connection loss handling: changes made while offline will be cached and sent when connection is re-established |
| Edges could be often disconnected |
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| Security | Security | Need to lock down access to APIs EdgeX from remote hosts not authenticated |
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