%0 Journal Article %T Analytical Method of Average Run Length for Trend Exponential AR(1) Processes in EWMA Procedure %A Wannaporn Suriyakat %A Yupaporn Areepong %A Saowanit Sukparungsee %A Gabriel Mititelu %J IAENG International Journal of Applied Mathematics %D 2012 %I International Association of Engineers (IAENG) %U http://www.iaeng.org/IJAM/issues_v42/issue_4/IJAM_42_4_08.pdf