STATISTICAL QUALITY CONTROL OF CHEMICAL COMPOSITIONS AND HARDNESS VALUES OF GREY CAST IRON IN FOUNDRY SHOP – AJAOKUTA STEEL COMPANY LIMITED (ASCL)
Statistical Quality Control (SQC) analysis deals with quantitative data; it is also a scientific method of analyzing masses of numerical data so as to summarize the essential features and relationship of data in order to generalize from the analysis pattern behaviour, particular outcome or future tendencies. This res…