Patent ID: 7979154

Claim:
A management system that manages a semiconductor manufacturing device, the management system comprising: a first storage unit that stores therein a plurality of quality-control values, the quality-control values being values obtained by measuring a dimension of individual wafers at different times during processing of the wafers by the semiconductor manufacturing device; a second storage unit that stores therein a plurality of equipment parameters, the equipment parameters being values obtained by monitoring a state of the semiconductor manufacturing device at different times during processing of the wafers by the semiconductor manufacturing device; a third storage unit that stores therein a maintenance log of the semiconductor manufacturing device; a first setting unit that sets a correction value for correcting the equipment parameters to control the quality-control values based on the quality-control values in the first storage unit and the equipment parameters in the second storage unit; a fourth storage unit that stores therein the correction value set by the first setting unit; a second setting unit that sets a variable period in which the quality-control values vary; a retrieving unit that retrieves events sandwiching the variable period, the events including a maintenance of the semiconductor manufacturing device from the maintenance log stored in the third storage unit and a change of the correction value in the fourth storage unit; a third setting unit that sets an analysis period for analyzing a cause of variation of the quality-control values between the events retrieved by the retrieving unit; and an extracting unit that performs statistical analysis to quantitatively calculate a correlation between quality-control values and equipment parameters within the analysis period, and extracts a cause of variation of the quality-control values based on calculated correlation.