Elusion testing draws a statistically valid sample from the null set, the documents not selected for review, and examines them for responsiveness. The observed rate estimates how much responsive material eluded the process.
Sample size determines the confidence and margin of error.
Alternative Names:
Elusion Testing, Null Set Sampling
Why it Matters?
Elusion testing is the measurement that makes any culling or technology-assisted process defensible, because it converts a claim of adequacy into a number with a confidence interval. It is also the step parties skip when budgets tighten, which leaves them unable to answer the central question when a process is challenged: how much did you miss. Running the test and documenting the result is substantially cheaper than defending a process without it.
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Frequently asked questions
What does elusion testing measure?
Why is it worth the cost?
