pm#problem_analysis
  exclusion:  pm#environment_analysis  pm#task_analysis  pm#function_analysis  pm#implementation_analysis
  supertype:  pm#knowledge_engineering__knowledgeengineering  making a knowledge based system
     supertype:  pm#real_life_task  a task composed of more basic tasks
        supertype:  pm#task  processes modelled in knowledge acquisition, e.g., a diagnostic
           supertype:  pm#problem_solving_process__problemsolvingproces  cognitive activity to solve a problem
              supertype:  pm#process__proces  situation commonly considered as making a change during some period of time
                 supertype:  pm#situation  something that "occurs" in a real/imaginary region of time and space
                    supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                 supertype:  pm#process_or_process_description
                    supertype:  pm#processing_thing
                       supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                          supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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