Gabor-Granger / Van Westendorp: The general guideline is to have at least 200 responses in total and at least 100 responses within each segment.
Generic / Brand-Specific Conjoint: The quickest way would be to enter your attributes and levels into Conjoint.ly. The system will estimate the required sample size for robust results.
Claims test / Product Variant Selector: The general guideline for Claims Test / Product Variant Selector is 10 respondents per claim / variant tested:
This question from our users was answered on 26 September 2019. If there is anything else you'd like to know, please do not hesitate to contact us.