The MDM/R



In Ontario, a central Meter Data Management and Repository (MDM/R) provides a common platform for processing, storing and managing all Smart Meter data in the province. The MDM/R is one of the world’s largest system implementations of its kind, involving the use of emerging technologies to serve over 70 local distribution companies (LDCs), transforming industry meter-to-bill practices, and increasing customer awareness of electricity consumption. The system surrounding the repository provides validation and estimation services, billing determinant calculation as well as comprehensive audit trails for meter read data.


The MDM/R has been in operation since 2008, and is reliably processing reads from over 4 million meters a day, and fulfills 131 to 250 thousand billing determinant requests per day. At this time, most Ontarians have been transitioned to time-of-use (TOU) rates and have been receiving services from the system.


Data transferred to and from the MDM/R complies with a stringent industry protocol that describes how to transmit encrypted data over the Internet securely. The data stored and managed in the MDM/R is secure. Currently, only LDCs and their authorized agents have the ability to transmit or request information from the MDM/R. In accordance with established service levels, the MDM/R also has a disaster recovery facility at a geographically separate location that will resume all MDM/R functions should a business interruption occur.


The MDM/R is subject to an annual independent audit that is based on a Canadian Institute of Chartered Accountants standard. The audit evaluates controls and procedures that govern key MDM/R functions and the changes made to it. It also evaluates the confidentiality of information within the MDM/R.