Hawkar Qasim Birdawod., Dashty Ismil Jamil, & Dlshad Mahmood Saleh. (2021). Comparison of Efficiency and Sensitively between (Three Sigma, Six Sigma and Median Absolute Deviation) by using Xbar Control Chart. QALAAI ZANIST JOURNAL, 3(2), 803–812. https://doi.org/10.25212/lfu.qzj.3.2.33