1.1b(1) The geographic distances between the facilities and the changing preferences of the workforce have led to changes in communication mechanisms (Figure 1.1-2). The Communica-tion System (Figure 1.1-3) helps TL continuously examine its communication. A critical element is the evaluation of the effectiveness of communication, frequently by asking people individually whether they understand a certain message. Results from these queries are entered into the TillingNet Information Management System to discern the most effective mechanisms and media for different messages and audiences.