Independent Review Of Barrier Draw Process / National / 25 Mar, 2010

Racing Information Services Australia (RISA) has released the following Information Statement regarding the independent auditing of the random barrier draw system used for racing in all states and Territories of Australia (excluding WA).

Consistent with the policy of Racing Information Services Australia (RISA) to continually review the integrity of its core business processes, in late 2009 RISA engaged external parties to conduct an independent review of the software application (i.e. the Barrier Draw random number generator) used to assign barrier numbers for races in all States and Territories of Australia (excluding Western Australia).

The Barrier Draw software together with the associated business processes were reviewed through a set of specific procedures. The independent review included mathematical analysis surrounding the randomness of the Barrier Draw results of over 180,000 race meets covering a ten year period.

Consideration of What Constitutes “Random”

"Random" is defined as follows:

“A random barrier draw is not one that generates perfectly uniform and equitable barrier draws (across horses, or across time) because with randomness comes unpredictability. This means that unexpected results can, and will occur as frequently as the random process implies. In fact, the absence of these anomalies would actually suggest that the process is distinctly non-random.”

Overall Finding as to the Randomness of the Draw

“Based on the examinations undertaken by the independent experts, including consulting actuaries, no statistical evidence was found to reject the hypothesis that barrier draws are random. It was concluded that the observable results are consistent with random barrier assignments”.

In summary, the findings of the independent Review are as follows:

Barrier Draw Software Review
The random number generator algorithm used was, and is effective for the purpose of generating barrier draws

Barrier Draw Historical Analysis
Based upon analysis of the last ten years of actual barrier draws the test results did not indicate any evidence of non-randomness

Barrier Draw Stress Testing
A simulation of 100,000 barrier draws, using the random number generator, found no evidence of non-randomness

Barrier Draw Horse Tests
Testing of barrier draw results, comprising 119,923 horses, was performed to assess whether any individual horse was unduly advantaged or disadvantaged by the barrier draws over a ten year period. The testing found no evidence that the actual distribution deviated from the expected normal distribution.

About Racing Information Services Australia
Within the Thoroughbred racing industry RISA provides a number of integrated products & services nationally to principal racing authorities, race clubs, owners, trainers, breeders, jockeys and punters. RISA also fulfils an important role in managing the industry's racing materials on a national basis, bringing in outside revenue through the sale of a variety of products. RISA's products and services include; Registrar of Racehorses – a division of RISA, RISA Stable Assist, RISA Form, RISA Materials, RISA Publishing, RISA Connect, RISA Tickets, RISA Technology and the TTSC – a division of RISA.

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Copies of the full report
Copies of the detailed report containing the findings are available by contacting the Chief Executive Officer of RISA on +61 3 9258 4711 or