Team members of the company being interviews with applicants. What is the purpose?

1. Ensure transparency.

2. Identify the potential candidate.

3. Assess knowledge, skills and attitude.

Sir

 I think the main purpose is to let the  team members assess whether the newcomer can adapt himself with the team. This is a practice  started in japan where existing team members go with the prospective emploee to a resturant for a chit chat. But it is a make or break for the candidate.

The purpose of an interview is to allow a hiring team members to evaluate the qualities of an applicant in a personal setting.