The Composite Manufacturing PMI measures the performance of the manufacturing sector and is derived from a survey of purchasing and supply executives from 13 locations in Nigeria. The survey shows the change, if any, in the current month compared with the previous month. The PMI is presented as an average of variables with the following weights: production level (25 percent), new orders (30 percent), supplier deliveries (15 percent) and employment level and inventories (20 percent). A reading above 50 indicates an expansion; below 50 represents a contraction; while 50 indicates no change.