Which option is not a way to improve your process capability ratio?

The option that states "Ignore existing limits" is not a way to improve your process capability ratio because doing so would undermine the principles of process improvement. The process capability ratio measures how well a process can produce output that is within specified limits. By ignoring existing limits, one would effectively dismiss the constraints that define the quality and capabilities of the process.

Improving process capability entails recognizing and working within those limits to enhance performance. This can be achieved by changing specifications, which might tighten or loosen requirements based on market needs; modifying the process to enhance efficiency or effectiveness; or outsourcing to leverage specialized capabilities that can better meet or exceed existing specifications. Ignoring limits, however, would lead to inconsistency and potential quality issues, detracting from the overall aim of process improvement.