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Why you may need both Parametric and Direct Modeling?

Why you may need both Parametric and Direct Modeling?

When it comes to product design, product design teams have been forced to compromise for far too long. When it comes to using CAD software, users of 3D software have been constrained to a single modeling environment.

For all jobs, a paradigm – either parametric or direct – must be used. And for those who like 2D, it has been difficult for them to have easy access to and exploit their data in 3D as well as challenging.

However, with Creo™ Elements, you can now choose the best tool for the job, whether it’s 2D or 3D, parametric or direct. Whether you’re developing or browsing designs, you can now use the best tool available. You have interoperability like never before.

10 areas where direct modeling can be used in conjunction with parametric modeling:

1. Concept Design

During this stage of development, Industrial designers are frequently involved. They do not, however, require the complex parametric tools used by 3D CAD specialists to express design intent and work with parameters or feature trees.

Instead, industrial designers must create many concept designs for the future product fast and discuss them with internal stakeholders and customers. At this point, the best CAD system is one that allows for quick geometry generation and ideation. When a user is forced to consider how to utilize a 3D CAD program, creativity suffers and innovation suffers as a result.

Parametric CAD Challenges:

  • Because conceptual designers do not engineer products, parametric 3D CAD is unnecessary for them.
  • Conceptual design is a creative process that necessitates the use of a 3D modeler that is quick, flexible, and simple to use.

In this circumstance, direct modeling is the best counterpart to parametric modeling since it provides concept design speed, versatility, and ease of use.

2. Bids & Proposals

The competitive bid procedure requires each supplier to submit their proposal within a specific time frame, making the process time-sensitive. The competitive bids are reviewed when they are received, and the supplier is ultimately chosen based on their total price point and ability to explain and demonstrate value.

The better or more precise the geometry, the more likely the new business will be secured. The ideal CAD system will aid the bid process by allowing geometry to be easily developed, reducing the time and expenses associated with creating bid geometry. The proposals also serve as a proof point for the supplier to see if the project is feasible.

Parametric CAD Challenges:

  • Bid geometry creation demands CAD expertise, which is frequently unavailable from technical salespeople.
  • Many parametric CAD systems lack the ease of use, speed, and modeling flexibility required in the bid process.

Direct modeling is an excellent addition to the bid and proposal process since parametric CAD technologies lack the ease of use, speed, and modeling flexibility required to produce throw-away bid geometry.

3. Digital Prototyping

To display and assess design possibilities, digital prototypes are commonly built to support the detailed design phase of product development. The goal is usually to determine the viability of a design.

A CAD program that is simple to use, intuitive, and interactive enough to encourage creativity and the brainstorming process is ideal for digital prototyping. The optimal CAD solution for digital prototyping should make it simple to reuse and repurpose existing geometry. Using carry-over or legacy data as the foundation geometry to swiftly construct digital prototypes is preferable to re-creating digital prototypes from scratch.

Parametric CAD Challenges:

  • For rapid prototyping, the parametric 3D design process is typically too sluggish.
  • Working with and updating historical data or data from several CAD tools is difficult.

By allowing history-free, geometry-based creation, and editing, the direct modeling approach is more suited to meeting digital prototyping requirements.

4. 2D to 3D Conversion

Concept design and the generation of technical deliverables frequently necessitate the use of 2D design capabilities. The ease of 2D design allows for quick conceptual design and layout detailing.

The optimal 2D CAD solution should allow 2D-to-3D model conversion and give extensive 2D design capabilities. To support downstream deliverables, the best 2D CAD solution should be coupled with the best 3D CAD solution to speed up the 2D-to-3D conversion process and take advantage of the capacity to produce 3D models directly from 2D data.

Parametric CAD Challenges:

  • 3D parametric CAD programs frequently lack powerful, user-friendly associative 2D design capabilities.
  • Converting 2D to 3D models is time-consuming and tedious, requiring a large amount of effort to recreate 2D profiles in 3D CAD.

The direct modeling approach is a great complement to parametric modeling in this case since it supports fast 2D design and 2D-to-3D model conversion while also providing integral 2D and 3D capabilities.

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5. Legacy Data Utilization

The need to support legacy data is a continuing task for many organizations, presenting a number of issues as a result of the need to retain and carry over past data to support current and future activities.

To support current and future programs, the optimal CAD system must have the ability to use, preserve, edit, reuse, and repurpose legacy data.

Using numerous parametric CAD systems and their incapacity to interact with native and non-native legacy data are the most common causes of problems with reusing legacy data. Furthermore, when using parametric modeling, the geometry is usually imported as a “dumb” entity, which implies the user has limited editing possibilities.

Parametric CAD Challenges:

  • Traditional CAD systems don’t allow you to modify non-native CAD data. 
  • Legacy 2D and 3D CAD data are frequently viewed as “dumb” data that are difficult to maintain, alter, and repurpose.

Designers can use historical data and repurpose and alter it exactly like they would if it had been developed in the direct modeling CAD application.

6. Interoperability

Interoperability and data exchange are essential for using the extended enterprise and communicating and sharing the full range of engineering deliverables with suppliers, vendors, and partners. The CAD system should make it simple to include non-native data in the design process, reducing the amount of effort required.

Parametric CAD Challenges:

  • Imported CAD data is frequently viewed as “dumb” data.
  • Traditional parametric CAD software frequently lacks the ability to modify non-native CAD data.

Designers can use legacy data with direct modeling to repurpose and change it as if it were developed in the direct modeling CAD application.

7. Late Design Changes

Late-stage design modifications are typical and unanticipated in many industries, but they must be addressed quickly and efficiently.

The 3D solution’s purpose is to encourage creativity and innovation while maximizing the ability to react to and execute change at every level of the product development process.

The best CAD solution must also allow for quick geometry development and editing. Late in the process, the inability to address rapid turnaround can have a significant influence on production timelines and product success.

Parametric CAD Challenges:

  • Design intent limits the capacity to apply unanticipated design changes; the inability to implement late-stage design modifications.
  • Understanding and reworking design intent is a slow and difficult process that necessitates the creation of new models.

Unlike the parametric modeling paradigm, which allows for prescriptive and preset changes based on the design intent, the direct modeling paradigm allows for radical and unexpected changes to be implemented.

8. CAE & FEA Workflows

Early in the design and development phase, computer-aided engineering (CAE) is used to test and improve the structural integrity and performance of engineering designs. The goal is to reduce the time spent analyzing CAD geometry and provide engineering input.

To improve the speed and accuracy of outcomes, analysts will frequently prepare the CAD geometry for analysis. Analysts will first evaluate the overall geometry and de-feature CAD models to remove any extraneous features.

Analysts, on the whole, aren’t CAD experts and don’t spend their time on CAD or design work.

Parametric CAD Challenges:

  • Analysts who are not experienced CAD users have difficulty modifying parametric CAD geometry, therefore they must rely on CAD specialists to de-feature and prepare models for analysis.
  • The capacity to make changes is limited by model history and design intent alterations to designs

Analysts dealing with old and diverse CAD data benefit most from the direct modeling approach. Direct modeling’s geometry-based approach eliminates the requirement to access feature-level data to make design modifications. Data from any CAD source can be easily edited, modified, and repurposed by analysts.

9. Creation of Downstream Deliverables

To support product development and the product lifecycle, a wide range of downstream deliverables must be generated. These deliverables guarantee that the product will be developed, supported, and serviced effectively. CAD illustrations for service manuals and spare parts catalogs are common deliverables.

Fixtures and jigs are also required to help with the inspection and machining procedures. Fortunately, the bulk of end-deliverables just require the downstream user to reference and use the CAD information, rather than creating complex CAD geometry. 

The optimal CAD solution for developing downstream deliverables is one that has a high enough level of accessibility to allow even non-CAD users to build their final products. Aside from ease of use, the right CAD solution should make it simple to work with data from any CAD source.

Parametric CAD Challenges:

  • Because downstream users are not CAD experts, engineers must create geometry to assist downstream deliverables.
  • Incapacity to deal with data from any CAD source with enough flexibility and freedom

The direct modeling framework offers the simplicity and modeling flexibility needed to define the full spectrum of end deliverables. It is geometry-based modeling, which is free of history, and accommodates heterogeneous data and the need to make unexpected and extreme adjustments. Users may easily edit, change, and repurpose heterogeneous CAD geometry using a geometry-based methodology.

10. Design Analysis

Cross-functional team members must gather to review the status of major engineering deliverables and program milestones during design reviews. The design review process is an opportunity to use the team’s aggregate knowledge and expertise in diagnosing and addressing technical difficulties, in addition to analyzing design activities and the team’s progress.

The CAD solution must provide designers with the speed and flexibility to build and manipulate geometry on-the-fly in order to improve the efficiency and efficacy of the design review. Users can avoid or lessen the need for follow-up meetings by utilizing the right CAD solution, saving time, effort, and money.

Editing, reusing, and repurposing CAD geometry to demonstrate design alternatives is frequently required to speed up the design review process.

Parametric CAD Challenges:

  • During the design review process, the inability to illustrate and assess “what-if” scenarios.
  • Inability to make drastic and unanticipated changes to CAD geometry

Direct modeling’s features ensure that any data may be changed, reused, or repurposed to quickly mock up geometry that reflects a new product configuration or an alternative to be evaluated, giving you the most freedom.

Within the product development scope, direct modeling can undoubtedly complement parametric modeling in a variety of ways. As a result, many businesses are opting to use both types of modeling in their operations.

Indovance Inc is a trusted and specialized CAD outsourcing partner catering to the design and drafting needs of the AEC industry since 2003. Our professionals develop a comprehensive model using full-featured modeling tools that combine parametric and direct modeling capabilities in a unified environment.

For more queries regarding any of the above-mentioned topics, feel free to connect with us on our website www.indovance.com, or contact us at +1-919-238-4044.

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