Different Industries use the acceptance charts to assess if the process could meet customer specified requirements because the acceptance charts are competent tool to answer the critical question that's to see if the process average stays between acceptable levels so the final product meets the customer specification levels. Also process capability determines that if the manufacturer could meet customer's requirements or should improve its process by reducing the process variation and fitting it's mean. What is discussed in this paper, is the use of the mentioned charts in 6-Sigma applications and how the capability analysis results help to know the status of production specifications. A case-study as an example is included to clarify the acceptance chart concepts.