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Data Quality

Data Quality Framework changes for 2024/25

Unchanged metrics

These metrics will NOT change for 2024/25: COUNT2, CRASH1, CRASH2, CWAY2a, CWAY2b, CWAY4, CWAY7, CWAY8, ESTIM1, ESTIM2a, ESTIM2b, ESTIM2c, ESTIM4, ESTIM5, MAINT1, MAINT2, MAINT3, MAINT4, MAINT6, SURF1a, SURF1b, SURF3, and TREAT1.

All other metrics have been changed (or will shortly change) for 2024/25.

Information Only metrics

A range of metrics have been set to be Information Only for 2024/25. The results will be calculated and shown for these metrics, but the results will not contribute towards the score and the summaries on the Data Quality Dashboard.

There are different justifications for a metric being Information Only:

  1. RCAs have minimal or no ability to influence or manage the data that the metric tests. For example, the CCDC project will manage the collection and loading of HSD data, this will not be under the control of the RCA. The AMDS network model project defines the centrelines that are loaded into the RAMM databases, rather than RCAs managing their own centrelines.
  2. AMDS introduces tighter validation of data which means migrated RCAs may report disproportionately higher results than non-migrated RCAs for some metrics. While the migrations are continuing, metrics significantly affected by this will continue to be reported but will not influence the score.
  3. A range of metrics test that asset data is being added on the assumption there are ongoing new network developments and that regular renewals are continuing to be carried out. In some of these cases, RCA or market financial constraints will make the likelihood of this low. These metrics will continue to have their results reported but the RCAs' scores will not be influenced by financial constraints in their area.

The following metrics will be Information Only for 2024/25: CWAY1, CWAY6a, CWAY6b, DRAIN2, FOOT2, HSD1, HSD2, HSD3, LIGHTS3, RAIL2, RATING1, RATING2, RETAIN2, ROUGH1, ROUGH2, SIGNS3, and SWC2.

This list will be reviewed each year.

Alignment between AMDS and pre-AMDS

AMDS introduces significant changes for some asset types, for example:

  • Lights (luminaires) in AMDS do not have to be attached to a bracket (outreach) or pole.
  • The northing and easting locations are not part of the AMDS standard so no assets in an AMDS database can be expected to have this data.
  • All asset types under AMDS use the standard owned by and sub organisation structure to define ownership. Pre-AMDS, some asset types such as signs and streetlights did not use the RAMM asset owner standard.
  • AMDS introduces a series of asset statuses including "pre- In Use" (design and as-built) statuses. Asset Inventory metrics are being updated to only report on In Use (and where applicable, replaced) assets, as RCAs using AMDS are beginning to use the early life statuses in RAMM.  
  • AMDS introduces new minimum and maximum values for some attributes, and makes some attributes mandatory that were previously optional.

 The Asset Inventory metrics are being updated for 2024/25 to accommodate these changes.

Individual metric changes

To see the individual changes that have been applied to each metric, click the "Changes" button for the metric in the DQ Meric Library. The Change log lists the changes made to the metric each year.

To see how the changes have been applied for 2024/25, click on the [RAMM SQL] or [AMDS RAMM SQL] buttons depending on whether you have migrated to AMDS.

Metrics are still being updated for 2024/25. If the Change log does not show a 2024/25 change but one is anticipated, please contact the Transport Insights support desk to see when the change is due.

Improvements to the Extended descriptions

The extended descriptions (including the purpose and consequences statements and specific comments) are also being updated to provide more specific guidance on each metric as well as the impact of AMDS etc. These descriptions will continue to be updated over time.