A manager wants to determine the number of kanbans to use in a new process for a part. The process will have a usage rate of 8 pieces of the part per hour. Because the process is new, the manager has assigned a safety factor of 1.0. Each container holds 50 pleces and a kanban will take an average of 90 minutes to complete a cycle. a. How many kanbans should be used? (Round up the final answer to the next whole number.) Number of Kanbans b. As the system improves. will more or fewer kanbans be required? More kanbans required Fewer kanbans required