| Increased chance of increasing the income, effect on their expectations regarding the services of a recreation park. They want a recreational park where the place can be a place to take time out and feel the positive emotions. One of the agencies that have been engaged in the field of sports in Indonesia is PT. Development Jaya Ancol Tbk. which is the developer of Taman Impian Jaya Ancol. Ancol Dreamland has several recreational attraction in 2013, of which this is Beach Park, Dunia Fantasi, Dream Ocean, Atlantis, Art Market, Sea World, Gondola, Hailai, Bowling, Ancol Art Academy, Paintball, and Ecopark. Fantasy World is one of the most desirable recreational objects Indonesian population, especially Jakarta residents. Dunia Fantasi, which opened to the public on August 29, 1986, and popular with the title Dufan, is the first theme park developed by Ancol. To determine the priority of attributes that should be fixed in a fantasy world menaganlisis the service quality, gray relation analysis method was used to determine the grade of each priority. And then these attributes are grouped into several clusters by hierarchical clustering methods. The results of the study are contained 3 cluster service attributes, where there are 10 attributes in cluster 1, 15 attributes in cluster 2 and 5 attributes in cluster 3. While the group attributes that need improvement is the cluster that contains 3 attributes: affordable admission price, program package affordable price games, food and drink prices reasonable, affordable price souvenirs, and a short time Queue Games |