The phases of inventory and mapping are crucial to make a system visible. Any serious management and leadership effort as well as a design intervention should always rely on a careful and accurate system mapping.
We can find the weak links and the strength points of a product, an organization, a service or a group only if we know how it is composed. We need to know not only all of its components but expecially their relationships. What buttons shall we push and in which sequence to create the effects we desire? Make the system visible to redesign, develop and lead it.