Md. Enamul Kabir, Md. Golam Kibria. Investigation of Sigma Level at the Stage of Testing Cement after Packing and Improving it using FMEA Approach. GJRE [Internet]. 2014 Mar. 15 [cited 2024 May 3];14(G2):43-56. Available from: https://engineeringresearch.org/index.php/GJRE/article/view/1132