Overture -- Collaborative strategic improvement -- Learning in and between organizations -- Action learning in and between organizations -- Intermission : the state of our understanding -- Collaborative strategic improvement action learning programme design -- Effecting collaborative operational strategic improvement through network action learning in a non-contractual setting -- Effecting collaborative strategic improvement in the contractual setting of an extended manufacturing enterprise -- Realizing sustainable strategic improvement -- Guidelines for realizing sustainable strategic improvement -- Action learning research in inter-organizational settings -- Finale.