The present disclosure relates to a computer implemented appraisal system (100). A repository (102) stores a set of pre-defined organization rules, a lookup table having a list of employees, and actual emoluments, computed historical appraisal score values, employee details, and a set of pre-determined parameters corresponding to each of the employees, and a predicted weightage corresponding to each of the set of pre-determined parameters. An analyzer (104) analyzes the stored employee details to generate a plurality of clusters of employees. A matrix creator (106b) creates a matrix for each of the pre-determined parameters, and populates each cell of the created matrix with a rating value by comparing a score value of each of the employees associated with the cell. A ranking module (106a) generates a rank value for each of the employees. A validation module (110) identifies an error or a bias. A computation module (112) computes emoluments for each of the employees.