A study of various deficiencies observed in the process of pile carpet weaving in the Province of Kashan has revealed that the most important defects are: unevenness, crimpled sides and erroneous application of the cartoon. Improving weavers’ skills will have a significant effect on reducing these defects. Therefore, weavers should be given educational advice on recognizing the capabilities of looms and other rug weaving equipment, the quality of raw materials and their harmonious use, the correct way of weaving flatwoven rugs, the manner of interlacing the wefts, and daftin-zadan (pounding an iron comb on the weft).