The system of testing shells, which remained in use up to 1944, meant that, statistically, a batch of shells of which 70% were faulty stood an even chance of being accepted.
O sistema de probas de proxectís, que permaneceu en uso ata 1944, levou a que, estatisticamente, un lote de proxectís dos cales o 70% eran defectuosos tiña a mesma probabilidade de ser aceptado.