Patent ID: 7640131

Claim:
A computer-usable medium having computer readable instructions stored thereon for execution by a processor to perform a data analysis method for analyzing failure root causes for products by collating a plurality of parameters measured for said products or facilities for manufacturing said products, the data analysis method including: a step of classifying a data group provided for each parameter into a first group and a second group based on the performance of the products for each parameter; a step of calculating a base point of a distribution of said data group based on a distribution of said first group and said second group; a step of deciding a distance range from said base point; a step of calculating the number of data (FX) within said distance range for the data group belonging to said first group; a step of calculating the number of data (FY) outside said distance range for the data group belonging to said first group; a step of calculating the number of data (SX) within said distance range for the data group belonging to said second group; a step of calculating the number of data (SY) outside said distance range for the data group belonging to said second group; a step of calculating a yield impact of said parameter on the occurrence of failure based on said FX, said FY, said SX and said SY; and a step of outputting said calculated yield impact to a user interface of a computer system used by said processor.