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Copyright 2006 Raytheon Company 21st International Forum on Systems Software and COCOMO Cost Modeling Systems Engineering Cost Estimation System of Systems Jon K Ilseng November 8 2006 SECOST is a tool developed by Raytheon and used with permission 10 21 06 1 Agenda Copyright 2006 Raytheon Company Introduction Systems Engineering Definitions COSYSMO SECOST History SECOST Capabilities and Functionality SECOST Cost Estimation Mode System of Interest System of Systems Definition System of Systems Examples SECOST Cost Estimation Mode System of Systems SECOST Recommended Modifications Summary and Conclusions SECOST is a tool developed by Raytheon and used with permission 10 21 06 2 Introduction Copyright 2006 Raytheon Company Systems Engineering Cost Estimates Our customers require believable and accurate estimates OSD AT L encouraging defense contractors to find most accurate and consistent systems engineering cost estimation method Critical that all 5 Raytheon Business Units IIS NCS SAS IDS RMS submit accurate consistent and believable cost estimates SECOST is a tool developed by Raytheon and used with permission 10 21 06 3 Introduction Copyright 2006 Raytheon Company Systems Engineering Cost Estimates Various cost estimates used past 20 years for a system of interest Heuristic and rule of thumb Systems Engineer use knowledge experience to prepare cost estimates no documented written evidence Expert Opinion From SE Domain Expert no scientific or historical basis Case Studies Provide vital information no scientific basis for how cost estimates actually prepared Top down and design to cost Top down approach starts at defined system level tries to capture SE Tasks but not scientific or historical basis DTC is designing a system to meet cost targets Bottoms up Common approach beginning with lowest level cost component and rolls up to highest level for total estimate resource intensive effort which is time consuming and many times no actual historical data to justify



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