Software cost estimation is the process of predicting the effort required to develop a software system. Cost estimation for project managers appelcost nasa. A comprehensive process for software estimation is documented in jet propulsion laboratorys jpls software cost estimation handbook jpld26303. Request pdf on mar 1, 2016, jairus hihn and others published improving and expanding nasa software cost estimation methods find, read and cite all the research you need on researchgate.
The nasa ceh was written in a direct manner so users can. Karen lum, john powell, jairus hihn, validation of spacecraft software cost estimation models for. Pdf evaluating software cost estimation models using. Cost estimation toolkit cet software package nasa gsfc. Additional guidance related to software cost estimation may be found in the following related requirements in this handbook. Credible software cost estimates are required to meet nasa policies. The data service provider cost estimation tool cet and comparables database cdb package provides nasas earth science enterprise ese the ability. Get the latest updates on nasa missions, watch nasa tv live, and learn about our quest to reveal the unknown and benefit all humankind. Credible software cost estimates are a key activity performed as part of a project and software life cycle management npr 7150. Cost estimating robert bitten, the aerospace corporation, marc hayhurst, the aerospace corporation. Estimating the cost of new spacecraft, like the space launch system that aims to bring the first humans to mars, is a complicated feat. Software the cost estimation toolkit cet is designed to provide nasa budget estimators, pis, project managers, and resource planners with the capability to generate lifecycle cost estimates for implementing, operating and maintaining a science data system. The cost estimation toolkitcet is designed to provide nasa budget estimators, pis, project managers, and resource planners with. The first part of the nasa cost estimating process is called the project definition.
Johnson space center johnson space center heliport 2101 nasa road 1, houston, tx 77058 usa. Evaluating software cost estimation models using particle swarm optimisation and fuzzy logic for nasa projects. Early lifecycle effort estimates can be inaccurate by up to 400% 1. Other features include inflation tables and cost phasing.
Nasaspecific cost estimation process information is available in software processes across nasa span, accessible to nasa users from the span tab in this handbook. The project cost estimating capability performs cost estimates for any spaceflight or space launch hardware system. Phase e cost growth for nasa science missions phase e is the payoff for the long awaited development of nasa science missions as it includes the mission operations to collect the science data required for success as well as the data analysis to. When you run the model, it will guide you through a process of building a work breakdown structure for your project, prince says. The nasacet cet is designed to generate lifecycle cost estimates for implementing, operating and maintaining a science data system.
The tool combines a userfriendly interface with work breakdown structures and cost estimating relationships cers. Another interesting result was that the out of the box cocomo performed better than a locally calibrated version based on comparing mre we saw this result in 2002. Software takes cost estimating to the stars nasa spinoff. Currently, nasa has agencywide licenses for both price1 and seer2 estimating suites, which both include software estimation tools see appendix e. The 20192020 nasa software catalog offers hundreds of new software programs you can download for free to use in a wide variety of technical applications. During this part, the estimator clarifies the reason for the estimate. A team led by marshalls engineering cost office has built nasas latest costestimating model, called the project cost estimating capability, or pcec. Project cost estimating capability pcec nasas software catalog. Get the latest updates on nasa missions, watch nasa tv live, and. Improving and expanding nasa software cost estimation. The first is to provide methods to be used to perform estimates of effort, staffing, schedules, and quality for use in estimating the total project costs. Pdf a comparative study for software cost estimation. Accurate cost estimation helps us complete the project within time and budget. Used to develop cost estimatesmodels for space systems, this technology combines an excel addin with a simple, robust, and transparent collection of nasa.