A cutting stock problem is one of the main and classical problems in different industries as well as in many aspects of our lives. The problem "Controlling and Managing of Reinforcement Steel Leftovers," is one of the important factors in construction industry. The aim of this study is to develop and test a system to minimize the waste, maximize the revenue and succeed in the optimal use of scarce resources. Data will be collected from real projects from Kingdom of Bahrain biggest factories; meanwhile, the developed software will be used to reach the desired results. The first step is to analyze the validity of the developed software according to various aspects. Then several case studies were taken from national Companies. Furthermore, interview questions are set up for managers and employees in these companies to design a control and management system. During the interviews, the companies' team were shown the results of the developed software before they answer the questions. Finally, it is to develop a proper management system that saves the raw material. It is found that the application of pre-determination of Reinforcement Steel Leftovers lengths will achieve significantly better results and thus reduce the amount of losses and achieve optimal use of resources. The most important result of this thesis is founding that not only achieving an optimum solution that leads to minimize losses, but to have an effective and flexible control and management system and an effective updated inventory system.