Quality control

Control materials are first-class.

control = ControlSample(name="QC-Level-1", target=100.0, sd=2.0)
monitor(control, measurements)

Rules are composable objects, not a hard-coded if tree. westgard_rules() implements the classical multirule set (Westgard et al., 1981).

rule = @qcrule consecutive_high begin
    idx = findall(v -> v > spec.mean + 2spec.sd, values)
    QCRuleResult("consecutive_high", !isempty(idx), idx, "custom", :watch, :statistical)
end
evaluate(rule, values, QCSpec(control))

Levey–Jennings geometry (Levey and Jennings, 1950) is available as structured data via levey_jennings_data. Plotting uses the optional Makie extension.