1. Compare and contrast the different push-button guards that are commonly used. Discuss the features of each type of push-button guard that are important to ensure that they adequately protect the operator. In your opinion, what is the most important variable to consider in designing a push-button guard?

2. Discuss how anthropometric data is used in designing controls on a machine like a metal press. What are some safety considerations when deciding to design controls for the press for the 90th percentile versus the 95th percentile? What are some important variables to consider if the press requires more than one control that require independent actions by the operator?

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