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This paper describes the purpose, development methodology, and utility of the Percent Milestone Backlog metric that was jointly developed by National Aeronautics and Space Administration (NASA) Goddard Space Flight Center (GSFC) and The Aerospace Corporation to monitor the execution performance of GSFC flight projects that are under development. All complex development projects experience delays and...
Numerous research papers have shown that cost and schedule growth are interrelated for NASA space science missions. Although there has shown to be a strong correlation of cost growth with schedule growth, it is unclear what percentage of cost growth is caused by schedule growth and how schedule growth can be controlled. This paper attempts to quantify this percentage by looking at historical data...
Although spacecraft developers have been moving towards standardized product lines as the aerospace industry has matured, NASA's continual need to push the cutting edge of science to accomplish unique, challenging missions can still lead to spacecraft resource growth over time. This paper assesses historical mass, power, cost, and schedule growth for multiple NASA spacecraft from the last twenty years...
Goddard Space Flight Center's Flight Projects Directorate employed a Business Change Initiative (BCI) to infuse a series of activities coordinated to drive improved cost and schedule performance across Goddard's missions. This sustaining change framework provides a platform to manage and implement cost and schedule control techniques throughout the project portfolio. The BCI concluded in December...
This paper examines the relationship between schedule delays and cost overruns on complex projects. It is generally accepted by many project practitioners that cost overruns are directly related to schedule delays. But what does “directly related to” actually mean? Some reasons or root causes for schedule delays and associated cost overruns are obvious, if only in hindsight. For example, unrealistic...
For the past several years, NASA Goddard Space Flight Center's Flight Projects Directorate (FPD) spearheaded the Business Change Initiative (BCI) to improve program planning and control practices to enhance cost and schedule performance. One outcome of the BCI is a renewed emphasis on schedule in the form of a directive to plan, assess, and measure schedule performance. A guideline with accompanying...
Operating a world-renowned space flight mission portfolio under tight policy, fiscal scrutiny, and increased competition makes open communication, visible performance data, and streamlined processes challenging. To respond to these challenges and meet cost and schedule commitments, Goddard Space Flight Center's Flight Projects Directorate employed a Business Change Initiative (BCI) to infuse a series...
In the early stages of NASA instrument development, science instruments are typically the most nascent part of any NASA mission development. As the building of spacecraft become less challenging for a mature industry, NASA's continual need to push the cutting edge of science requires the revolutionary and evolutionary development of instruments to meet science requirements. Instruments then face substantial...
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