Do it correct with proper reasoning. Do not attempt if not sure.

Why is it important to identify the bottleneck in a system? Choose all options that are correct.

		The bottleneck stage has a lot of idle time
		Workload at the bottleneck stage must be managed to keep its utilization at 50% approx
		Improvement efforts should be focused only on the bottleneck , till some other stage becomes the bottleneck
		Capacity of the system is limited by the capacity of the bottleneck
		Improvement efforts must be system wide