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https://www.csiac.org/journal-article/parametric-modeling-to-support-system-acquisition/
This article describes the use of parametric modeling to support independent government cost estimates at the feasibility/budgeting, acquisition, and on-going project lifecycle procurement support. Benefits over alternate approaches (analogy and bottom-up) are defined, and typical budgets for this activity are presented.
https://www.csiac.org/journal-article/parametric-modeling-to-support-system-acquisition/2/
Parametric Modeling Using High-Level Objects (HLOs) At the core, there are fundamentally three approaches to estimating: Bottom up 3, in which the project is decomposed to individual components that can be estimated by some other means, often expert judgment for labor.; Analogy, in which historic budgets or actual expenditures are used as a basis for current estimates.
https://support.ptc.com/help/creo/creo_pma/r6.0/usascii/index.html
Model-Based Definition Data Management Design Exploration Part Modeling Data Exchange Detailed Drawings Layout Surfacing Rendering Assembly Design Advanced Framework Design Welding Design Electrical Design Piping Manufacturing Mold Design and Casting Sheetmetal Model Analysis Simulation Language Support
https://www.csiac.org/journal-article/parametric-modeling-to-support-system-acquisition/3/
One alternate approach is to use a parametric modeling approach that makes heavy use of estimation by analogy concepts. The steps involved are as follows: Break the problem domain down into components where there is data available for analogous components. This might be the entire product, or a part of the product.
https://www.csiac.org/journal-article/parametric-modeling-to-support-system-acquisition/7/
Parametric models are a useful tool to support these estimates, offering improved accuracy and significantly reduced internal bias.
https://www.csiac.org/journal-article/parametric-modeling-to-support-system-acquisition/6/
The first step is that a parametric model based approach to estimation is agreed to by all stakeholders, configured, and validated. This might be a software cost estimating model, a construction cost estimating database, or any other standard estimating method that is objective and verifiable.
http://www.designtechsys.com/articles/parametric-modelling
Parametric modelling uses the computer to design objects or systems that model component attributes with real world behaviour. Parametric models use feature-based, solid and surface modelling design tools to manipulate the system attributes.
https://www.ptc.com/en/cad-software-blog/parametric-vs-direct-modeling-which-side-are-you-on
Apr 07, 2017 · In parametric modeling, engineers capture design intent using features and constraints, which enables them to automate repetitive changes. Direct modeling helps engineers define and capture geometry quickly, without worrying about features, constraints, and original design intent.Author: Mark Brunelli
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