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infrmation. As people are observed at work, as shown in Figure 4-21, consider a factor called the Hawthorne Effect. The name comes from a well-known study performed in the Hawthorne plant of the Western Electric Company in the 1920s. The purpose of the study was to determine how various changes in the work environment would affec employee productivity. The surprising result was that productivity improved duri ng FIGURE 421 The Hawthorne study suggested that worker productivaty improves during observation Always consider the Hawth orne Effect when observing the operation of an existing system