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At the strut level , where a more quantitative description of geometric defects is available , the gathered data is used to build a stochastic field model of geometric imperfections using Proper Orthogonal Decomposition .
 strut, quantitative, defects, data, build, stochastic, model, imperfections, Decomposition
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 strut, quantitative, defects, data, build, stochastic, model, imperfections, Decomposition