 For computer-based tests, automated item generation (AIG) is a promising method for generating multiple items "on the fly" that have similar form and psychometric properties using a common template.Referring back to the pictorial representation of Ratio and Algebra hierarchy, an item can be constructed to measure the skills described in each of the attributes.For example, attribute A1 includes the most basic arithmetic operation skills, such as addition, subtraction, multiplication, and division of numbers.