oa Civil Engineering = Siviele Ingenieurswese - Operating characteristic curves for concrete strength specifications
The form and function of operating characteristic curves are descriptionbed. When applied to specifications for the strength of concrete, the operating characteristic curve has been misused in such a way as to treat unfairly a specification for concrete strength in which every individual result must be greater than the specified level. It is shown that, contrary to current belief, such a specification gives a balance of risks which is at least as good as that of other forms of specification and that the balance of risks is independent of the variability of the results.
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