Dunman High has a very established quality control system within its orchestra. Secondarooy one members are not allowed to join combined rehearsals, probably to teach them humility and hone their basics. Most regular members (if not all) are required to undertake private lessons from their respective instructors. They are also expected to complete a series of individual grading examinations both in theory and practical.

The alumni, school and parental support is extremely strong. Semi-professional orchestras such as City Chinese Orchestra provide extra training for Dunman High's members.

As such, they are without much of a doubt, the most prominent secondary school orchestra locally. Of course, I believe that schools like Nanyang Girls and Catholic High are not too far behind.