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Quarter wave plates are optical elements commonly used in photoelasticity to obtain circularly polarized light. They divide the incident light field into two linearly polarized orthogonal components with a phase difference of a quarter of the light wavelength. Due to the tolerance in manufacturing, however, the actual phase shifting produced by the plates is affected by an error, which noticeably influences the photoelastic measurements performed by means of various automated methods. This paper presents a technique, based on the phase stepping method, for the full field automatic evaluation of the quarter wave plate error. Despite all the talk about decision making, uncertainty remains a factor, and no Ray Ban Sunglasses Edmonton one tells executives how to deal with it. Scientific management stops at the point where nature is not rational. If help is to be found, it must come from poets and preachers, men whose business begins at the limits of rational certainty. For a “case study,” the author uses Frost's famous poem, “The Road Not Taken”—an inside view of a moment of decision. The poet confronts uncertainty by taking the leap o f judgment, beyond facts and logic. We are reminded that such leaps are possible and necessary, and that courage stands next to intelligence as an irreducible ingredient in the decision-making Ray Ban Canada Aviators process.