Drama is considered to be an emerged spatio-temporal pattern of actors' actions in front of audiences. From the viewpoint of system dynamics, there are two types of agents in the creative process of making a drama. One is a cluster of actors and the other is a stage director. The actors prepare for their roles. The stage director, on the other hand, gives them various instructions to direct the whole flow of their actions. In other words, making a drama is regarded as a dynamic process to form

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... patiotemporal patterns of actors' behaviors and conversations that fits a given purpose, and it is controlled by the stage director making constraint conditions to the heterogeneous multi-agents (actors) who act various behaviors based on their own purposes or strategies. What is important is that the director dynamically changes his interpretation of actors' performances through the creative process of a drama, receiving feedback on his own evaluation (of a work in the creative process). The purpose of this study is to describe a system dynamics of such a process of making a drama. For this purpose, we implemented a field study in which real rehearsals for public performance are observed in detail, and attempted quantitative analyses on the dynamics in the creative process of a drama based on the theory of system dynamics. The relationships between director's instructions and variances or fluctuations in the time series of actors' performances, which are the responses to the instructions, were analyzed systematically. As a result, it was found that information embedded in timing was important to construct the reality of a drama. It can be said that well-balanced order was realized in the theatrical production as the whole system proceeded through rehearsals, although individual fluctuation of timing was included in performances by each actor.