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The development of complex products is a complicated multidisciplinary concurrent engineering with complicated task structure and strong technical innovation. The distributed development environment and networked collaborative design model not only bring great challenges to the modeling of complex product development, but also increase the need for risk assessment of the development process. In consideration...
Given the history of delays for NASA science instruments, a study was conducted to assess the viability of a new development paradigm called Instrument First, Spacecraft Second (IFSS) to reduce cost and schedule growth in future missions. The new paradigm was shown to provide many tangible benefits, including decreased portfolio costs and less portfolio volatility, but there were still questions as...
NASA space-borne instruments, while trying to pursue world class science, have had a history of developmental delays. These development delays can lead to cost growth for the overall mission, as shown in recent studies of NASA missions and a larger historical data set. An analysis was conducted to assess if a new mission development process, labeled instrument first, spacecraft second (IFSS), could...
This paper introduces a reliability optimization model based on the variation of quality. This model is established on the basis of the principle of variation of quality character and multi-objective programming, employing reliability and satisfaction degree of customers as the objective function, cost and schedule as the constraint conditions. So as a whole, this model not only presents a new perspective,...
China Central Television (CCTV) new site construction project had high technological content, advanced and well-functioning system. China Construction Third Engineering Bureau, as one of the construction companies in this project, introduced an advance concept and software of the project management. With the help of information technology means and combined with the characteristics of the project,...
NASA science instruments have had a history of developmental delays. These development delays can lead to cost growth for the overall mission, as shown in recent studies of NASA missions and a larger historical data set. There are examples of historical missions, such as QuikSCAT and QuikTOMS, that have had shorter development times and less than historical average cost and schedule growth, which...
An analysis was conducted to determine potential benefits of initiating instrument development prior to full mission development for NASA Earth Science missions. A cost and schedule analysis was conducted for representative Tier 2 and Tier 3 Earth Science Decadal Survey missions to quantify the benefits. The results indicate that the savings resulting from such an approach is on the order of $2B,...
JPL has been attempting to apply EVM techniques for the last 15 years with mixed success, especially when applied to software tasks. One of the main causes is that software presents particular challenges that were not considered during the genesis of EVM. A small number of tasks have been able to use EVM effectively and derive great benefits. This paper discusses challenges specific to software management...
The National Compact Stellarator Experiment (NCSX) is designed to test physics principles of an innovative stellarator design developed by the Princeton Plasma Physics Laboratory (PPPL) and Oak Ridge National Laboratory (ORNL). The project was technically very challenging, primarily due to the complex component geometries and tight tolerances that were required. As the project matured these challenges...
The earned value measure is introduced into the cost and schedule control of warship planned maintenance for the over budget and schedule delays problem. The flowchart and application range of earned value measure is summarized. The application procedure of the earned value measure in the cost and schedule control of warship planned maintenance is given. Then the over budget and schedule delays are...
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