How do you involve stakeholders in UX research?
Getting Started with UX Collaboration
Start with a short study, such as two days of user sessions. Invite stakeholders to attend any of the sessions they can make time for. Encourage them to attend at least two sessions, so they will be less likely to take a single session at face value.
What is necessary to get the buy-in for the project?
A key to being able to establish higher degrees of buy-in is in establishing the link between project and company goals and stakeholder values and motivations. This does not need to be a secret mission, but instead a direct dialogue with stakeholders to help identify and establish the linkage.