The purpose of this study is to examine the degree of regret of decision makers and how to feedback from surrounding’s stakeholders affects his/her reaction. We focused on the food ingredient’s ordering process in the military food service center to recompose the news vendor model situation. In the process of its ordering, its personnel have faced with several problems that include regrets to other alternatives unchosen. He/she determine and feedback the proper quantities with considering a senior commander (supervisor) opinion and his/her own insight and analysis results. We conducted a questionnaire survey for collecting several parameters including regret coefficient, feedback coefficient etc. and constructed a simulation model using their parameters and checking in parallel with the hypothesis that the regret of decision makers and the feedback of supervisor. In our experiment results we compared two models with the base using the average fixed heuristic. Through this study we show a positive effect on profit return for rational order decision by using Regret and Feedback model.