In order to plan LRSS design, n random samples should be selected each of size n,
where n is typically small to reduce ranking error. For the sake of convenience it is assumed that the judgment ranking is as good as actual ranking. LRSS has the
following steps:
Step 1. Select n random samples each of size n units.
Step 2. Rank the units within each sample with respect to a variable of interest
by a visual inspection or any other cost-free method.
Step 3. Select the LRSS coefficient, k = n , such that 0 ≤ < 05, where [x]
is the largest integer value less than or equal to x.
Step 4. For each of the first k + 1 ranked samples, select the unit with rank
k + 1 for actual measurement.
Step 5. For each of the last k + 1 ranked samples, i.e., the
n − kth to the nth
ranked sample, select the unit with rank n − k for actual measurement.
Step 6. For j = k + 2 n − k − 1, the unit with rank j in the jth ranked
sample is selected for actual measurement.
Step 7. The cycle may be repeated r times to obtain the desired sample size n∗r.