What is the fine-grained topic of the following text: Assuming the role of architects or planners, Jos de Gruyter & Harald Thys choreograph the process of production by embracing the machinery and the complex relationships they have set up: the labour of numerous people, who mediate between the artists and the post-Soviet steel industries in order to produce something that none of them have done before. Only return the topic.
Jos de Gruyter & Harald Thys' role in orchestrating production process in post-Soviet steel industries.