Abstract
The design with interlocking technique is a flexible method for the wooden furniture because it can help for reassembly. It is the process without glue or screw that didn’t destroy wood material after the installation. However, it has an disadvantage which is so many interlocking pieces from the mistake of the sequence process when they are assembled. However, it can be understood that why people mistake for the assembly from three conditions ; the rule base mistake, the knowledge base mistake, and the memory lapse mistake. The conditions were applied to three types of interlocking wooden furniture in the same number of assembling parts in order to compare and find out the causes or the wrong assembling by 20 participants.
