Approximating sample size requirements for s2 charts |
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Authors: | Douglas G Bonett Mahdi S Al-Sunduqchi |
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Institution: |
a Department of Statistics, University of Wyoming, |
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Abstract: | Sample size determination is one of the most important considerations in the design of a control chart. The optimal sample size will provide control over both type I and type II errors. The optimal sample size for an S2 chart can be determined exactly using an iterative procedure. Duncan presented a procedure to approximate the required sample size. The accuracy of Duncan's approximation is examined and an improved approximation is proposed. |
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