The Five Rules for Qualitative Research

Don't spread your research resources too thinly. Allow your researchers to concentrate in one area at a time, or one team at a time. This helps them then maintain the 70-30 rule and even the one-to-one ratio rule. Avoid discussions about ratios of researchers to designers to devs whenever possible. If you've got one researcher, is it then two UXs? Is it then 10?