A functional résumé differs from a chronological résumé by concentrating on skills that you have used that relate to your stated objective rather than on the jobs you have had. A functional résumé is particularly effective if your work experience has not been closely related to your job objective, if you are changing careers, or if you are seeking a promotion. In this format you elaborate on the skills necessary to perform the desired job and how you have demonstrated those same skills in a different type of job.