The purpose of this study was to apply Fautley's model-- [Faultley, Martin. 2005. "A New Model of the Group Composing Process of Lower Secondary School Students." "Music Education Research" 7 (1): 39-57. doi:10.1080/14613800500042109]of the group composing process to the analysis of a collaborative composing project in a lower secondary school (ages 11-14) orchestra setting. Students were placed into groups of six for a three-session composing project. Participants selected for observation, coding, and analysis included two groups of seventh grade students (N = 12) and one group of eighth grade students (N = 6). The process of establishing interobserver reliability with Fautley's model led to several challenges, resulting in proposed modifications to the model. A modified model is presented, along with reliability data, a coding procedure, and descriptive data collected using the new model.