The use of Control Charts with Composite materials

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Plotting the data against the Agate Acceptance Criteria show no problem with the material. Individual Values plotted with Spec Limit Compression Strength 120 110 100 90 80 0 10 20 30 40 50 Subgroup Nominal: 100.68 Spec Limit: 80.86
Advantages of Control Charts • The acceptance limits are computed using AGATE method. • If the Coefficient of Variation is unrealistically low for the qualifying material, it may be adjusted according to the following guidelines approved by the FAA last year: – Below 4%, set at 6% – Between 4% and 8%, set to ½ * C.V.+ 4% • In this situation, since the co-efficient of variation was adjusted up from 5.05% for the spec limit, the out-of control point is still within tolerance. Thus, the manufacturer can respond to the problem PRIOR to any out-of-spec product being produced.
Page 1 and 2: The use of Control Charts with Comp
Page 3 and 4: Example Control Chart X-bar Chart f
Page 5 and 6: Interpreting Control Charts • As
Page 7 and 8: Problems with traditional Control C
Page 9 and 10: Why use a multivariate control char
Page 11 and 12: Control Charts for Composites 40 Mu
Page 13 and 14: Control ellipses are used to evalua
Page 15: Plotting the data against the Agate

The use of Control Charts with Composite materials

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