Domain: technology (Engineering Design and Analysis)
Problem: To ensure operational efficiency until 11:35 AM, I need to determine the minimum number of announcers required to handle the flight schedule shown on the departure board. Each flight requires a 30-second live announcement at its corresponding gate area at the exact 'Expected' time. An announcer must start at the main dashboard, walk to the designated gate, perform the 30-second announcement, and return to the main dashboard before they are available for the next assignment. Please use the 'Walking time' matrix on the right to account for one-way travel times between the dashboard and each gate. Given that one announcer can only be at one location at a time, what is the minimum number of staff members needed to cover all scheduled tasks?
Answer: 7