How does the scoring system work?

Meeting exactly the required achievement level results in a zero score. Zero represents a successful outcome - the 'pass mark'.

A performance above the required level results in a +1, +2 or higher score depending on how far above the required level actual performance is. A performance below the required achievement level results in a -1, -2 or lower score.

Currently, the theoretical maximum score that any supplier may achieve across all 89 indicators is +153. The lowest possible theoretical score resulting from self assessment is -125. Approved contractors must score zero or higher on every individual indicator and therefore all approved contractors will have a score between 0 (a successful score) and 153 (the theoretical maximum score).

Independent Assessment

Although self assessment is the start of the ACS approval process, for Standard and Fast Track route applications, final approval is confirmed by an independent assessor from one of seven, SIA-appointed assessing bodies. These use the same workbook and scoring system as for the self assessment.

From April 2008 a new Passport route to approval (with a differing approval process) became available. As of 30 April 2008, no contractors have adopted this route.

The diagram below is based upon the actual independent assessment scores (for Standard and Fast Track route) for approved contractors assessed up to 30 April 2008, and illustrates the quartile approved.

How to use this information

These data provide an overview of the ACS scoring system and how approved contractors currently perform against ACS requirements. In this context an individual approved contractor can see how it measures up against other approved contractors.

We are confident that the ACS assessment process is consistent and rigorous and that these benchmark data are therefore meaningful. We review all assessment plans and reports are reviewed by us and hold regular meetings with the eight independent assessing bodies to ensure consistency of approach. All assessment, however, involves judgement on the part of the assessor and ACS assessment scores above zero should be viewed as indicative rather than absolute. Remember: zero is a good score, representing achievement of all ACS requirements. A high score may not mean that an approved contractor performs exceptionally well in all areas. Equally, some approved contractors may score below the current median level overall but perform exceptionally well in particular areas.

We intend to publish more detailed information as additional data become available and confidence in the value of assessment scores grows.