The distinction between different roles in the Involvement Matrix is as follows [26]: | |
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 • Listeners are given information about the project by the project team; | |
 • Co-thinkers are asked to give their opinion. Project teams can decide whether they will use it and how; | |
 • Advisors provide solicited and unsolicited advice. Solicited advice is binding. Unsolicited advice must be given formal attention and may only be rejected with substantiated arguments; | |
 • Partners collaborate with other project team members as equals. | |
 • Decision-makers take initiative themselves and/or make necessary decisions. |