This study analyzed the process of multimedia services and indexed the core quality characteristics through the tools employed in `Define` and `Measure` steps of the 6 Sigma DMAIC methodology. To achieve the goal, as a case study of `S` University Central Library, first, brainstorming technique was used to tap the librarians, second, interview with the half-time student workers, third, user`s opinion on homepage was analyzed and lastly, the interview with the users. This study also drew some potential causal factors which would likely to affect the multimedia service using Process Map and C&E Diagram. Those factors were prioritized using X-Y matrix and Pareto Chart. This study revealed 14 factors affecting multimedia services: `presence/absence of the persons who are in charge of selection`, `cycle of selection materials`, `presence/absence of seperated multimedia room`, `materials arrangement method`, `notification of popular materials`, `notification of documents arrivals`, `methods of noticing new arrivals`, `methods of ordering materials`, `cycle of checking order status`, `types of persons requesting materials`, `methods of requesting materials`, `checking of the status of the returned materials`, `methods of noticing materials in housed`, and `methods of ways to return overdue materials`.