Overview

Welcome to this expert-level training from the Tabtrainer® Certified Series - your trusted platform for applied statistical modeling in manufacturing.In this course, you will master the Two-Way ANOVA with interaction using Minitab®, based on real production data from the Smartboard Company. You'll analyze how laminating pressure and surface roughness influence the tensile shear strength in skateboard deck production - and learn how to validate statistical results with post-hoc tests like Tukey.From raw data preparation and model diagnostics to graphical interpretation and business optimization, this training builds your skills to evaluate complex processes with confidence.Led by Prof. Dr. Murat Mola, TÜV-certified Six Sigma trainer and Professor of the Year 2023 in Germany, this course empowers you to turn statistics into actionable production strategies:In this training unit, students learn how to apply the Two-Way Analysis of Variance (ANOVA) to evaluate the influence of two categorical factors on a continuous response variable, using a realistic industrial quality control scenario.The case study is taken from the lamination process in skateboard deck production at Smartboard Company, where the tensile shear strength of glued maple layers is the central performance indicator. The two experimental factors - laminating pressure and surface roughness - are each examined at three levels, leading to 9 parameter combinations and 270 measured values.Students follow a structured learning process:Data Preparation: Importing raw test data, stacking column blocks, assigning factor names, and formatting the response variable.Visual Analysis: Using boxplots and main effects plots to explore initial trends and identify possible interaction effects between predictors.Statistical Modeling: Performing a two-way ANOVA with interaction terms using the General Linear Model (GLM), interpreting p-values, and understanding the logic behind main effects and interaction effects.Model Diagnostics: Evaluating model quality with R-squared and residual analysis; confirming the normal distribution of residuals with a 4-in-1 plot and the Anderson-Darling test.Post-hoc Testing: Applying the Tukey significance test to identify which specific combinations of pressure and roughness lead to significantly different strength outcomes.Business Interpretation: Drawing conclusions about which parameter settings deliver the most stable and high tensile shear strength, and recommending optimized production configurations based on statistical evidence.By the end of the training, students are able to:Build and interpret a Two-Way ANOVA model.Understand and distinguish between main effects and interaction effects.Apply residual diagnostics to evaluate model fit.Use Tukey grouping letters and confidence intervals to validate significant factor combinations.Translate statistical results into concrete optimization strategies in an industrial environment.This training connects applied statistics with real-world manufacturing and enables participants to make better, evidence-based decisions in complex production processes.

Skills

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