The ASTM D661-93 (2019) standard provides a way to evaluate the degree of cracking of exterior coatings by visual inspection. The diagrams in the standard help to compare with the actual cracking of the sample surface to determine the failure of the Coating. However, the standard does not describe the evaluation process in detail, so it is recommended to use it in conjunction with Miscellaneous accelerated aging test methods such as ASTM G154 to fully evaluate the performance of the Coating. This comprehensive test helps to understand the performance of the Coating in actual use and its durability.