On a Universal Factory-Oriented Quality Index for Corrugated Board

Abstract

Quality assessment of corrugated board in industrial practice is usually based on individual laboratory tests such as the edge-crush test, bending stiffness, or shear-related measurements. While informative, single-test evaluation cannot capture the combined effects of anisotropy, structural degradation, and material efficiency. This editorial highlights the need for a universal, factory-oriented quality index that integrates results from commonly used tests into a single, interpretable scalar. The proposed concept emphasizes normalization with respect to basis weight, aggregation of directional properties, and sensitivity to shear-related damage mechanisms. A general mathematical framework is outlined, demonstrating how mechanical performance, structural integrity, and economic considerations may be combined to support transparent benchmarking and more informed industrial decision-making.