The Use of Modern Statistical Methods to Optimize Production Systems in Foundries

Abstract

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.

Choosing the Production Function Model for an Optimal Measurement of the Restructuring Efficiency of the Polish Metallurgical Sector in Years 2000–2015

“…For this reason the choice of a right measure to assess the efficiency of company's operations, including restructuring processes, becomes crucial. In metallurgical industry such enhancement of the decision-making process is mostly performed with quantitative, sometimes with qualitative, but hardly every with a mixed quantitative-qualitative approach [12]. Peleckis [26] observes that decision-making can be influenced by the emotions of the individual, which is another argument in favour of the implementation of qualitative methodology into the scope of this research.…”

“…Qualitative verification via expert opinions on relations between production factors and production output enriches the analysis, as experts have an independent vision of restructuring effects. Even if expert opinions are subjective and production function models are objective, only a combination of qualitative and quantitative research offers a complex perspective and provides an integral research methodology on the development of enterprises [12].…”

Steel Weld Metal Deposit Measured Properties after Immediate Micro-Jet Cooling

“…The use of modern techniques is an attempt to optimize the production systems connected with welding and foundries. Micro-jet cooling was also tested in foundries, and can be used as the econometric model based on the methodology proposed by Szymszal et al [28].…”

Archives of Metallurgy and Materials

“…Often times, the above conditions are not assured. This is due to the following reasons: low-volume production, data do not meet the normal distribution, or a tool is needed to detect small shifts in process mean values [11,12]. The solution to this problem are cards with special purpose.…”