Stanislavski subjected his acting and direction to a rigorous process of artistic self-analysis and reflection. His 'system' of acting developed out of his persistent efforts to remove the blocks that he encountered in his performances, beginning with a major crisis in 1906. He produced his early work using an external, director-centred technique that strove for an organic unity of all its elements—in each production he planned the interpretation of every role, blocking, and the "mise en scène" in detail in advance. He also introduced into the production process a period of discussion and detailed analysis of the play by the cast. Despite the success that this approach brought, particularly with his Naturalistic stagings of the plays of Anton Chekhov and Maxim Gorky, Stanislavski remained dissatisfied.