How could empty soapboxes go out of the factory?The engineers checked the production and packing.The production wasfine,but in about one in ten thousand cases,the packing machine let an empty soapbox go.There was no need to spend a lot of money repairing the machine for such a small problem.The engineer soon worked out solution.He put a huge X-ray machine and two large computers to find out the empty soapboxes.After teaching the workers how to use it,he sat down in his seat,exhausted.