Poor reproducibility. Recently, I have evaluated some materials which are from other company. I need to have a meeting with the company's engineers and report about results of the materials. I found their martarials are not good in reapetability. Actually my target is 1000 plus minus 25 (for exemple), also the materials can satisfy the target because of average value for 985, but there is a big standard deviation for 9. when I subtract the value from the average value, I can get 976. It means the matarials has a poor reproducibility. So I assesed that the materials are poor reproducibility and reported to my clinets. When the moment I said your materials are poor reproducibility, my clients got angry. Why did you give the judgment for our materials? He said. I just let him understand my purpose, even though the materials showed an acceptable value but when the standard deviation is large we are difficult to control the process of using the materials. After explained finally they understood me. But I was worried how to use the word (instead of poor) to make others be comfortable. I guess the meaning of "poor" is diferent between my clients and me. May be we need a technique to communicate with others. Especially, in business communication we must do carefully.