The Commission's request for qualifications shall utilize criteria for each proposed contract which will comprise the basis for the selection and ranking of eligible firms to perform the required services. The criteria shall include, but not be limited to, such factors as professional excellence, demonstrated competence, specialized experience of the firm, education and experience of key personnel, required qualifications, staff capability, workload, ability to meet schedules, principals to be assigned, nature and quality of completed work, reliability and continuity of the firm, location, professional awards and other considerations deemed relevant by the Commission. Such factors shall be weighed by the Commission according to the nature of the project, the needs of the State, and the complexity and special requirements of the specific project.