Josefer,
You've posed an interesting question, which unfortunately I don't have a definitive answer for. The amount of time your department chairs need to put into their advisory boards depends on several factors; a) their job description, b) expectations of senior management, c) training on creating and managing advisory boards, d) perceived and actual value received from their advisory boards; and e) their willingness to be more than average and just go beyond just complying with accreditation requirements. If you can answer these, then you may come closer to the amount of time that could/should be spent on creating and… >>>