There are two specific reasons for measuring adhesion. The first is to obtain a numerical value that can compare the difference in adhesion between one formulation, substrate or surface treatment to another. The second and more difficult application of adhesion data is estimating the joint performance in the real world.
Common adhesion test methods are fine for making comparisons, but are ill suited for making life-expectancy predictions. In the past, collecting the appropriate data for making durability predictions was very tedious.