Describe, in your own words, the two types of variation that Shewhart identified
What will be an ideal response?
Controlled variation (common causes) is variation present in a process due to the very nature of the process. This type of variation can be removed from the process only by changing the process. For example, consider a person who has driven the same route to work dozens of times and determined that it takes about 20 minutes to get from home to work regardless of minor changes in weather or traffic conditions. If this is the case, then the only way the person can improve upon this time is to change the process by finding a new route.
Uncontrolled variation
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Which specifications place almost total responsibility for the choice of materials, methods, and performance standards with the architect, not the contractor?
a. technical c. design b. performance d. construction
Develop additional defi nitions for the following design problems:
a. a reserved seat system for commuter trains b. a manufacturing assembly line for making picture frames c. a sorting machine for plastic bricks of various colors What will be an ideal response?
Find the Fourier series expansion of the backward sawtooth waveform of Fig. 17.48. Obtain the amplitude and phase spectra.
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In a circuit, three wires form a junction. The currents in two of the wires are 5 A and 12 A. The current in the other wire is _____.
A. 60 A B. 17 A C. 7 A D. 7 A or 17 A