In determining inspection plans for quality control, two important variables are the frequency of sampling and the sample size. Typical values are once per hour, with a sample of size 4 or 5. However, this may be far from the most appropriate or efficient scheme in a given setting. Also, the capability index necessary to produce zero defects under the historical maximum and average shift in the process is essential information in providing motivation for process improvement. This paper presents microcomputer-based software using readily available information for determining economically optimal sampling plans and zero-defects capability indices. Great economic benefits can result from more careful attention to sampling plans, and the attainment of zero defect process capability indices.