In small and medium-sized enterprises (SMEs), the ways of operating are dependent on the specific nature of their business activity, while management methods are often used intuitively. The paper shows that specialization, defined as offering products to companies from one or from two to four industries, is of great importance among SMEs in the gas sector. The analysis of the applied management methods allows us to conclude that the most important ones are those related to human capital.
Conducting reliable and credible evaluation and statistical interpretation of empirical results related to the operation of production systems in foundries is for most managers complicated and labour-intensive. Additionally, in many cases, statistical evaluation is either ignored and considered a necessary evil, or is completely useless because of improper selection of methods and subsequent misinterpretation of the results. In this article, after discussing the key elements necessary for the proper selection of statistical methods, a wide spectrum of these methods has been presented, including regression analysis, uni- and multivariate correlation, one-way analysis of variance for factorial designs, and selected forecasting methods. Each statistical method has been illustrated with numerous examples related to the foundry practice.