What Is A Retest?
If the result of your child’s test is abnormal, a repeat test or a “retest” is usually required. A request for a retest does not necessarily mean your child has a disorder, but it is possible. If you are asked for a retest, it is important that you take your baby for the retest as soon as possible.
The term retest is often used interchangeably in two quite different contexts, and this can be confusing. Some IWTO Specifications (test methods) such as IWTO-19 (Determination of Wool Base and Vegetable Matter Base of Core Samples of Raw Wool) and IWTO-12 (Measurement of Mean and Distribution of Fibre Diameter using the SIROLAN_LASERSCAN Fibre Diameter Analyser) require testing of replicated subsamples. When testing is completed the results of the individual subsamples are compared and if the maximum differences are within specified ranges the results are all combined and the average of all subsamples is issued on the Certificate. If the specified range is exceeded then additional subsamples drawn from the residual sample material and these are remeasured, with specified range checks being applied to all subsamples. This cycle can in some cases be repeated up to 3 times. Sometimes the testing of additional subsamples within a laboratory before the Certificate is issued is referred to
