The paper presents new procedure of methodology for statistical assessment of measurement systems variation (methodology known in the literature as Measurement Systems Analysis, MSA). This procedure allows for calculation and monitoring in real time (that is on-line) of measurement system (MS) characteristics which determine its usability for manufacturing process control. The presented solution pointed out the gap in process control, which consists in lack of methods for monitoring measurement processes in the on-line way. Their key point consists of taking samples that are also needed for the process control chart for the needs of the MSA method. This means that the samples are taken directly from the production line and during the production process. The method is combined with the standard procedure of statistical process control (SPC) with the use of process control charts. It is based on two control charts. The first one is called AD-chart (Average Difference chart) and it allows to estimate the variation between the operators and stability of the monitored measurement system. The second control chart illustrates the %R&R index (Repeatability and Reproducibility) and allows to monitor the MS capability.The paper also presents authors’ proposal of guidelines about the reference value for the %R&R index calculation and assessment. Recommendations and guidelines for choosing the reference value are based on two criteria: information about sample and manufacturing process variation and the purpose of using MS (product or process control).

The paper introduces a concept of assessment of a ductile iron casting process with use of the rule-based approach, known as DRSA (dominance-based rough set approach). The research was conducted in a large Polish foundry. The collected data concern the chemical composition and mechanical properties of the used ductile cast iron. In the paper, a methodology of creating a rule-based moulding model for the tensile strength was proposed. The quality, sensitivity and accuracy of the model extracted from the data were examined. The studies proved its usefulness in the industrial practice and for aiding of the decision making process.

The aim of the paper is to present the authors' novel approach to methodology for assessing the level of raters agreement (process operators, quality controllers and/or experts) and its interpretation, that is the methodology for study of reliability for qualitative characteristics. Both mathematical tools and study organizational guidelines are discussed. The method is based on the novel fuzzy similarity coefficient SC. The proposed methodology was used in a measurement system study for attributes of a tube connector of Swan-Ganz catheter production process.

Owing to its promising physical, chemical, and optical properties, glass is the most widely used material in sophisticated micro-electro-mechanical systems (MEMS) devices. These devices are finding large number of applications in the fields of medical electronics, biotechnology, energy, automobiles, aerospace, etc. While manufacturing MEMS devices, micro-holes are needed to be produced in glass with high levels of accuracy. Micro-drilling in glass using the electrochemical discharge drilling (ECDD) method is an emerging technique. Enhancing the material removal rate (MRR) and lowering the entrance hole overcut in ECDD are the major challenges during this process. To address this problem, significant attention is focused on blending two or more techniques known as hybridized methods to improve the quality of the ECDD process. In the present study, a combination of magnetic flux density (MFD) and high-speed tool rotation was employed during the ECDD process for the glass. Additionally, the effect of the process variable viz. the voltage, tool rotation speed, and feed rate of the MFD around the workpiece was analyzed. Finite element analysis was employed to obtain the optimal MFD over the workpiece. For different voltages, tool rotation speeds, and feed rates; the performance analysis of MRR and entrance hole overcut were compared in the absence and presence of magnetic field-assisted high-speed ECDD.