Note the parameters that characterize the object's evolution from its past to its present
Guiding a project through TRIZ: multi-screen analysis

In the arrows symbolizing past-present transitions, we need to distinguish between parameters whose evolution has been positive for the technical system and parameters that have deteriorated. These parameters need to be discussed one by one by the group to form part of the first population of parameters extracted from the analysis. This identification of parameters must be carried out at the three systemic levels: super-system, system and sub-system.