en تخصصي Special پژوهشي Research Abstract In this paper we have investigated a fuzzy linear programming problem with fuzzy quantities which are LR triangular fuzzy numbers. The given linear programming problem is rearranged according to the satisfactory level of constraints using breaking point method. By considering the constraints, the arranged problem has been investigated for all optimal solutions connected with satisfactory level of quantities on all intervals that constituted from breaking points of the constraints. Optimal solution could be obtained on the constructed [ p-1 ,  p] intervals for p=1,2… Here the fuzzy primal simplex algorithm is designed based on revised TSAO’s ranking method. Keywords: Triangular Fuzzy Number, Ranking Fuzzy Number, Revised Tsao’s Method ,Fuzzy Linear Programming Problem, Breaking Point, Fuzzy Primal Simplex Algorithm. 0 0 http://ijorlu.lahijan.iau.ir/browse.php?a_code=A-10-1-39&slc_lang=en&sid=1 T. Beaula edwinbeaula@yahoo.co.in 1003194753284600204 1003194753284600204 Yes S. Rajalakshmi 1003194753284600205 1003194753284600205 No