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To evaluate coverage consistency in a CNC shot peening process, buyers should focus on three things: whether coverage is defined and verified correctly, whether the machine controls the real drivers of uniformity, and whether the process is monitored and documented well enough to prove repeatability in production. A system that only promises automation is not enough. The better investment is the one that can demonstrate stable media flow, repeatable blast motion, part-specific programming, and clear verification methods for critical areas. In procurement terms, consistent coverage is not a cosmetic detail. It is one of the clearest signs that the peening process is genuinely under control.