What are the units/factors you take into account when estimating or scoping your user research? Other than the business domain's complexity, remote/in-person research and the difficulty of participant recruitment, I am looking more for quantitative units that could help assess the complexity of a user research initiative. Would you use a hierarchy that goes like this?
- Number of User Groups
- Number of User Journeys
- Number of User tasks
- Length of user tasks
- Number of User tasks
- Number of User Journeys