The PLC is effective.
		Frequency	Percent	Valid Percent	Cumulative Percent
Valid	Agree	303	36.1	39.6	39.6
	Neutral	116	13.8	15.1	54.7
	Disagree	347	41.3	45.3	100.0
	Total	766	91.2	100.0
Missing	System	74	8.8
Total		840	100.0