Corrugated boxes tend to fail in two primary ways: either by collapse under a compressive top-load created by stacking, or by rupture due to rough handling or heavy or awkward loading. Different tests can be used to predict the performance of corrugated board and corrugated boxes under these two conditions. Several other tests can be used to monitor corrugating and converting operations in box plants. This course describes several tests that can be used at box plants to predict product performance or to monitor operations. These include the box compression test (BCT), edge compression test (ECT), short-span compression test (SCT), bending stiffness, tensile stiffness, box drop test, burst strength test, puncture test, flat crush test (FCT), warp test, and pin adhesion test. It also lists the organizations which have developed standardized test methods for corrugated board and explains the importance of sample conditioning.