Demonstration Test Plan (Minitab): Weibull with known shape β — to demonstrate reliability R at
time t₀ with confidence C using a test of duration T per unit and c allowed failures, the sample size
solves Σ_{i≤c} C(n,i) qⁱ (1−q)^{n−i} = 1 − C with q = 1 − R^{(T/t₀)^β}. Give sampleSize instead
to solve for the test time.
Demonstration Test Plan (Minitab): Weibull with known shape β — to demonstrate reliability R at time t₀ with confidence C using a test of duration T per unit and c allowed failures, the sample size solves Σ_{i≤c} C(n,i) qⁱ (1−q)^{n−i} = 1 − C with q = 1 − R^{(T/t₀)^β}. Give
sampleSizeinstead to solve for the test time.