Repeatability & Reproducibility

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Repeatability

The variability of measurements obtained by one person while measuring the same floor slip risk.

Simple repeatability test

Chose an area of clean dry floor. Place SlipAlert on ramp on the floor and take 10 measurements from the same location. Wipe the slider with dry paper between each measurement. The 10 results should all be within 1-2 points of the average.

Slipalert will deliver very consistent results on a clean floor. Other machines may measure the same floor and give varying results with no actual change to the floor slip risk.

Reproducibility

The variability of results caused by differences in operator behaviour. best measured by having three testers who each take two measures of the slip risk of 10 different floors. SlipAlert performs very well in this test with very little variance between the results from different operators.

Repeatability and reproducibility test:

Three people each take two measurements of ten different floors. Note: all users should adopt the same test method:

• Use SlipAlert standard slider and wipe the slider with paper to ensure it is clean and dry between each test

• check that SlipAlert wheels are turning freely and that it is switched on

• Ignore and re-do any tests where SlipAlert is not released correctly or where it has obviously left the ramp awkwardly because of misalignment on release

• For wet tests, ensure that the whole length of slide is wet (SlipAlert may stop sharply or spin if it hits a dry patch of floor)

• Record the 60 different measurements and compare each set of 6 measurements. Each of the six measures should be very similar.

We are confident that for each operator the measurements will be within 1-2 points of the overall average measure for each floor.

SlipAlert is the best measure of slip risk. Contact us to find out more about using SlipAlert to benefit your business.