Which market research technique revolutionized telescope design in the 2010s by identifying previously unknown consumer pain points?

The astronomy product market has evolved significantly over the past decade, with manufacturers using sophisticated research techniques to develop products that meet the needs of both amateur stargazers and professional astronomers. This poll tests your knowledge of how astronomical product companies gather consumer insights to shape their development strategies.

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Ethnographic observation studies where researchers shadowed astronomers during nighttime viewing sessions
Traditional focus groups with professional astronomers from major universities
Large-scale online surveys distributed through astronomy forums and websites
Analysis of telescope return rates and warranty claim patterns