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In product design process,when dealing with technical problems or initiating a new design,R&D personnel would often turn to technical database to seek inspiration.The building of a database with such documents has not been systematically dealt with.A case study of building a database for robotic design is used to demonstrate the concept.It is an archive of more than 1500 relevant technical papers.A total of 16 graduates are employed as operators in the labeling process and subsequently the binomial hypothesis test is utilized to process the labeling results.To ensure this database quality,the labeling consistency of each operator is validated by t-test.All the relevant concerns,including labeling policy and quality control are discussed.With the use of statistical methods,this work proposes a feasible and practical way to create such a database for product design.