Abstract: The expert decision support system (EDSS) for the control of ore quality in the production ore-bins of one large scale open pit iron mine has been constructed. The EDSS was integrated with the expert system (ES) developed by expert system tool software VP-EXPERT and the decision support system (DSS) developed by integrated software LOTUS 1-2-3. The ES and DSS were linked together using VP BCALL and DOS BAT.