Exam variables (including marks for various subjects, overall score, interview score).
• Job variables (including years at job, employment status, position).
• Performance related variables (including promotion score, performance evaluation and total score).
Target variables definition
Target variables such as promotion score and performance assessment are determined in this research with respect to the conceptual model.
Promotion score: This score is defined as the spread between the scores of the position he or she was hired for, and his or her current position. If there is no change this score will be 0. The maximum score that was reached was no greater than 1150. Considering this variable is one of the target variables, the scores are grouped in four levels as shown in Table 1.
Performance assessment: This variable will be determined based on employee’s performance evaluation, which was conducted at least twice per year for each employee. The maximum score is 100. All the quantitative scores are grouped in seven qualitative categories as shown in Table 2.