An adult who lives in California in The U.S. work at least 30 hours weekly to add up his wage and studying at college. He found an offer by his friend to get a job in two plants. In the first plant he can work between 4 and 8 hours weekly, on the second plant he is allowed to work between 4 and 12 hours weekly. Every plant pays the same amount per an hour. In decision making about how many hours to work in each store, an adult wants to base his decision on work stress. Based on reviews of current employees, adult estimates that, on an increasing scale of 1 to 12, the stress factors are 10 and 7 at plant 1 and 2 respectively. Because of that fact is stress increases by the hour, he suppose that the total stress for each plant at the end of the week is proportional to the number of hours he works in the plant. Try to find the decision variables then make the correct formulation of this problem to be like linear programming model, furthermore find the solution of a problem. An adult who lives in California in The U.S. work at least 30 hours weekly to add up his wage and studying at college. He found an offer by his friend to get a job in two plants. In the first plant he can work between 4 and 8 hours weekly, on the second plant he is allowed to work between 4 and 12 hours weekly. Every plant pays the same amount per an hour. In decision making about how many hours to work in each store, an adult wants to base his decision on work stress. Based on reviews of current employees, adult estimates that, on an increasing scale of 1 to 12, the stress factors are 10 and 7 at plant 1 and 2 respectively. Because of that fact is stress increases by the hour, he suppose that the total stress for each plant at the end of the week is proportional to the number of hours he works in the plant. Try to find the decision variables then make the correct formulation of this problem to be like linear programming model, furthermore find the solution of a