A computer program written by author in Delphi for statistical control of production processes is presented. The JM-SPC program can be used for both the variable valued and the attribute valued data type. The data are introduced manually into table (up to 20 columns; up to 10000 rows). The option of data introducing is with some function equipped, which make this process very easy. The data analysis option offer many of analytical techniques. For variable valued data sets following control tools are available: individual values chart, average values chart, moving average values chart, exponentially moving average values chart, median values chart, range chart, standard deviation chart. Also two-signal control charts are available, for example: X-R, X-S, Me-R, Me-S. For variable valued data the performance of processes can be evaluated by using of two commonly used indices: potential process capability index (Cp) and process capability index (Cpk). For the attribute valued data type the user can select: p- and np-chart, c- and u-chart, Pareto diagram. Application of JM-SPC program for statistical analysis of real processes has been presented on the example of Al-Si high-pressure die casting production. For example of production of two different frame castings following analyses have been conducted: 1) the analysis of defect fraction in sample (by using the p-chart), 2) the analysis of relative differences in importance of each defects categories (by using of the Pareto diagram).