Question

Case1 An engineering manager has been designated the task of evaluating a commercial device subject to marked variations in temperature. Three different types of component are being considered for the device. When the device is manufactured and is shipped to the field, the manager has no control over the temperature extremes that the device will encounter, but knows from experience that temperature is an important factor in relation to the component's life. Notwithstanding this, temperature can be controlled in the laboratory for the purposes of the test. The engineering manager arranges for all three components to be tested at the temperature levels: -10"C, 20"C and 50%C-as these temperature levels are consistent with the product end-use environment. Four component are tested for each combination of type and temperature, and all 36 tests are run in random order. The resulting observed component life data are presented in the following table. lemperature Type -10 20 50 3.12 1.80 3.60 3.82 3.31 4.03 3.07 4.32 4.51 3.02 2.64 3.84 0.82 1.92 3.02 2.54 4.18 3.60 0.96 1.80 2.93 2.76 2.88 3.34 0.48 1.97 0.60 1.39 2.30 1.97 1.68 1.39 1.68 1.08 2.50 1.44 Managerial report 1. What are the effects of the chosen factors on the life of the component?

Answer 1

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