LAUSR

This study aimed to analyze the test project of joinery trade in the Regional Competition, Taiwan National Skills Competition (hereinafter referred to as Regional Competition) and to assess the association between test projects of different sessions by the Derivative Calculation Equation ( $$\sum\nolimits_{{i = 36 - 48}}^{{n}} {\rho 49th\chi }$$ ∑ i = 36 - 48 n ρ 49 t h χ ) and fuzzy similarity, which was expected to help to analyze the species, the type and method of joints to be used in the Regional Competition. According to the result, (1) there was no significant variation among the species of materials adopted in the 36th to 48th Regional Competition; (2) “open bevel mortise-tenon joint” was the one with the maximum assessed value in the types of joints; (3) the values of assessment of “open mortise-tenon joint” and its transformation were the maximum in the methods of joints. The overall result of assessment conducted by the Derivation Calculation Equation was reliable and associated with fuzzy similarity, and it was expected to help to improve the strategy of capacity assessment in vocational education and training and to further increase learning efficiency and skill level of the competitors. Under the systematic method, the strategy of training and guidance of assessment can be established to nurture more professional talents in woodworking.