Northern Ireland Construction Output Statistics

Methods

A summary of the methods used in the production of the Northern Ireland Construction Output Statistics can be found here...

A review of the seasonal adjustment model used for the Construction Output Statistics was carried out by the Office of National Statistics (ONS) in 2009. A copy of the review indicating its findings and recommendations can be found here...

Quality

A summary quality report for Northern Ireland Construction Output Statistics can be found here...

It is intended to provide users with information on how the statistics have been compiled and the quality of the information upon which they may be drawing conclusions and making decisions.

Standard Errors and Coefficients of Variation (CVs)

Standard Errors and Coefficients of Variation (CVs) have been calculated for the main construction output measures (in current prices) and are available here...

An explanation of Standard Errors and Coefficients of Variation (CVs) can be found in the Summary Quality Report here...

Revisions

It is normal practice for Northern Ireland Construction Output estimates to be revised. Results, particularly for the latest quarter, are provisional and subject to revision as more up to date information becomes available.

A copy of the Revision Policy which highlights how planned and unplanned revisions to the Northern Ireland Construction Output series will be managed, can be found by clicking here...

A revisions triangle has been developed for the Northern Ireland Index of Construction.  This is designed to help users understand the extent to which estimates are revised over time.  The revisions triangle presents a summary of the differences between the first estimates of growth published and those published 3 years later for the same reference period.  These differences are tested to see if there is a significant difference between them.  To access the revision triangle please click here...