Kano Model
The Kano model categorizes product features by their impact on customer satisfaction: must-haves, performance, delighters, indifferent, reverse.
Developed by Noriaki Kano in the 1980s. Each feature is rated by customers on two dimensions: 'How would you feel if this feature was present?' and 'How would you feel if it was absent?' The combination classifies the feature: Must-have (basic), Performance (proportional satisfaction), Delighter (surprises positively), Indifferent, or Reverse. Used in product prioritization.
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Product-Market Fit Survey (PMF)
A PMF survey measures whether a product has achieved product-market fit, typically via Sean Ellis's 'very disappointed' test.
Sample Size
Sample size is the number of respondents needed for survey results to be statistically meaningful at a given confidence level and margin of error.
Margin of Error
Margin of error is the range within which the true population value likely falls, given the sample size and confidence level.
Confidence Interval
A confidence interval is the range within which a true population parameter is expected to fall, at a specified confidence level.
Pulse Survey
A pulse survey is a short, frequent survey (3-5 questions) used to track sentiment over time.
Van Westendorp Pricing
The Van Westendorp Price Sensitivity Meter uses four questions to identify the range of acceptable prices for a product.