Final answer:
The concept being illustrated is lack of communication or disregard for team input when the master scheduler does not act on the team's feedback.
Step-by-step explanation:
In the scenario of a master scheduler at a tire manufacturing company receiving revision requests, the concept being illustrated when the master scheduler does not act on the team's feedback is lack of communication or disregard for team input. This concept is related to the management principle of collaboration. When the master scheduler disregards the team's feedback, it can lead to inefficiencies, delays, and a breakdown in the overall production process.