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A Study On Weapon Equipments Cost, Performance, And RMS Integration Design Optimization Method

Posted on:2008-07-02Degree:DoctorType:Dissertation
Country:ChinaCandidate:Y T TanFull Text:PDF
GTID:1116360242999224Subject:Management Science and Engineering
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Cost as an Independent Variable (CAIV) is a new weapon-system-acquisition strategy of DOD, U.S., and it's also a management method for controlling and reducing the lifecycle cost of new weapon systems. It requests the users, the government, the test operators, the logistics personnel, and the project managers to cooperate together, in managing the process from the very beginning to the synthesis on optimization of the systems' performances, RMS and the LCC, in satisfying the future operations requirements under the premise to reduce the life cycle cost as far as possible. CAIV method replaces the requirements of performance targets with Capability-based requirements, so the performances of the weapon systems should be flexible for the contractors, and can be traded off with RMS and LCC. CAIV gives more freedom to industry in designing and producing weapon systems, and would reduce the LCC. It often uses the Total Ownership Cost (TOC) as the research objective, instead of the Life Cycle Cost (LCC).In this thesis, a Cost-Performance-RMS Optimizing Design Method was studied based on the CAIV. By the reference of foreign researches, the actual development processes of defense programs in our country, and aiming at the defects of existing research result, some studies have been made in the thesis as follows:Firstly, it brings out a new management process for Cost-Performance-RMS Optimizing Design based on CAIV theory, which includes the organizations for Optimizing Design, the responsibilities and tasks in every phase during acquisition processes. It makes an analysis on the defects in common development process of weapon systems in our country, such as redundant circulation and inefficient Cost Management; and suggests improving on this process by the CAIV theory and Concurrent Engineering method. At the same time, the key technologies for this process are enumerated in detail.Secondly, it brings out a Cost-Performance-RMS Tradeoff Model which including the schedule and risks. This model treat the Time of Completion Model as a schedule constrain conditions in tradeoff study. Then it suggests developers to treat risks and cost estimating uncertainty as stochastic variables, and a new tradeoff method of Uncertainty Programming is put forward, which includes the stochastic expected value model and chance-constrained programming model. There is an example of this method application.Thirdly, a schemes and targets decision-making method based on Tradeoff Study is researched. Considering the conditions of ambiguity of cost affordability goals and the systems' design alternatives in development, the decision-making method should select the best alternative by tradeoff studies. At the same time, an Upgrade COEA method is brought out, which could help the decision makers to find out the optimizations of alternative, target vectors and cost goals. Then it gives an example of this decision-making method.Finally, it suggests a mixture method integrating the CAIV method with MDO, and builds the CAIV-Based MDO model. The method makes tradeoff studies on the performance design, RMS design and costs, which is used for distributing and optimizing the Performance and RMS of system's components, and gives a detailed scheme of total system. At last, a case study of XX missile design task is showed to test this model, and it makes out the final results by the CSD.
Keywords/Search Tags:Cost as an Independent Variable (CAIV), cost, performance, RMS, Design Optimization, tradeoff
PDF Full Text Request
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