The main aim of ER model (as the name implies) is the enumeration of the application domain’s entities and their inter relationships. The detail level of an ER model depends on the scope of the application.
Lengo kuu la ER mfano (kama jina ina maana) ni enumeration ya vyombo maombi ya uwanja na mahusiano yao baina. undani ngazi ya mtindo ER inategemea wigo wa matumizi.