International Journal of Neutrosophic Science IJNS 2690-6805 2692-6148 10.54216/IJNS https://www.americaspg.com/journals/show/986 2020 2020 Faculty of Informatics Engineering, Al-Sham Private University, Damascus, Syria Maissam Jdid Department of Mathematics and Computer Science, Faculty of Science, Port Said University, Port Said, Egypt A. A. Salama Administrative Assistant for the President of Telafer University, Telafer, Iraq Huda E. Khalid Mathematical programming can express competency concepts in a well-defined mathematical model for a particular situation or system, and the ability to derive computational methods to solve this mathematical model, it is also a mathematical tool that allows us to model, analyze and solve a wide range of problems concerned with allocating rare resources of labor, materials, machinery, and capitals. Consequently, using them in the best attainable way to minimize costs or maximize profits. In such issues, the linear programming is one of the most widely used types of mathematical programming because it is a method that helps to make good decisions and decide the best program for independent activities, considering the available sources. It does not take in consideration the continuous and rapid changes and the state of instability in data. So, this manuscript studies one of the methods to solve linear models, which is the simplex method using the neutrosophic theory that covers all the data in analysing, whether specific or not, determined or not, having consistency or not, as well as it deeming all occurring changes. However, the optimal solution is related to the variables in the objective function, which in turn are affected by the fixed quantities that express the available possibilities. This article presents a study to solve the linear model using the simplex method in which the variables and their coefficients are indeterminate values, and we will explain the effected of the indeterminate values on the optimal solution of the mathematical model.  The product mixture problem has been presented as case study to demonstrate the efficiency of the proposed method. 2022 2022 30 41 10.54216/IJNS.180104 https://www.americaspg.com/articleinfo/21/show/986