Web-based system of product performance assessment and quality control using adaptive PDF fitting

A system comprising:

• a data acquisition module that acquires data for a product;
• a probability density function (PDF) fitting module that fits the data with a plurality of PDFs, selects a PDF that best fits the data, and generates one or more performance capability parameters for the product based on the best fitting PDF;
• and
• a report generator that generates a report that presents at least one of the performance capability parameters.

A computer-readable medium comprising instructions for causing a processor to:

• receive data for a product;
• fit the data with a plurality of probability density functions (PDFs);
• select the PDF that best fits the data;
• generate one or more performance capability parameters for the product based on the best fitting PDF;
• and
• generate a report that presents at least one of the performance capability parameters.

A method comprising:

• obtaining parameters associated with a probability density function (PDF) that best fits a set of data for a product;
• adjusting statistical control limits based on the parameters;
• receiving data associated with the product;
• triggering a user when a predetermined amount of the received data is outside of the adjusted statistical control limits;
• using a one-sided pre-control chart when one of the parameters is at or above a threshold;
• and
• using a confidence interval control chart when the parameter is below the threshold.