An ordnance factory gets brass tubings in lots of 15,000 units from a supplier whose performance in the past has been satisfactory, to the extent of finding 1 in 200 items to be defective on an average. The sampling plan had been n = 70 and c = 2, which was quite adequate, Of late, the supplies have been poorer in quality, i.e. there are more defective items than in the past. It is estimated that on average, the defectives have doubled, to the extent of 1:100 items. The supplier attributes this to the ageing of his machines and equipment. Being a reliable supplier otherwise, the ordnance factory would still like to retain him on their list but tighten up the quality control procedure so that the ordnance factory will, under any circumstance, have no greater than 2 per cent defectives in this input material to their factory—What sampling plan can the ordnance factory use for this supplier?