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"Many rejected parts and assemblies are due to orientation tolerances rather than simple size tolerances. Enventive automatically identifies orientation sensitivities for the user and therefore, enables the user to produce a much more robust design. " - Sainan Feng, Nexteer Automotive


How to start an Enventive Concept project

When starting a new Enventive Concept project, the user faces an important decision: “Should I start from a blank sheet or import my existing geometry from CAD?”

Actually, four different approaches are possible:

  1. Starting from scratch
  2. Importing geometry from CAD and constraining the functional geometry
  3. Importing and automatically constraining CAD geometry
  4. Mixed approach

1- Starting from scratch

Following this approach, the user manually enters all required functional information in a new Enventive Concept model. Rather than representing all the elements in the CAD model, the user only needs to enter the functional elements for the specific GD&T study. The following figure illustrates this approach for studying the functional elements of a brake cylinder:

Functional geometry directly sketched in Enventive Concept

At first sight, it may seem that this approach is not the most efficient method to create a new project. Indeed, it is not the preferred approach among many new Enventive Concept users. However, we see that more advanced users tend to use this approach, as they create models earlier in the design process, before CAD models are finalized.

Pros: Quick to enter only functional geometry + the user must think about each dimension and its effect on the product’s design

Cons: Lack of visual information

2- Importing “locked” geometry from a CAD model

 One of the drawbacks of the previous approach is the lack of visual information that helps product managers, colleagues, clients, suppliers, etc. to quickly understand the model. To provide this visual information in an Enventive Concept model, users can import geometry from an existing CAD model using a STEP/IGES file.

Using this approach, the user exports a 2D section of the part to a STEP/IGES file, and then imports the file into Enventive Concept as “locked” geometry, which essentially means that the geometry does not include any dimensions and acts as if it’s fully constrained (which essentially means that the geometry does not include any dimensions or constraints and the geometry is ignored by the Solver). The user “unlocks” and dimensions only the functional entities, leaving the rest of the geometry that has only a visual purpose “locked.” The following video illustrates this approach using the same CAD model as in our previous example:

Pros: Visual aid to assist in understanding the part + reuse of existing CAD data + more intuitive for new Enventive Concept users

Cons: Exporting an appropriate view of the geometry from the CAD model may be more time-consuming than just sketching the functional geometry from scratch for experienced Enventive Concept users

3- Importing and automatically constraining CAD geometry

 Enventive Concept includes an automatic constraining wizard that automatically assists the user in constraining imported CAD files. This tool can save considerable time applying the datums, dimensions and constraints needed to fully define an imported model.

Enventive Concept auto constraint wizard for geometrical tolerancing

Pros: The wizard helps inexperienced users + quickly performs repetitive tasks

Cons: Not as flexible as other methods

4- Mixed approach

This method is an alternative mixed approach that uses the information of the CAD file as a “background” image. Then, the user draws the functional geometry on top of that image.


Enventive Concept alternative mixed approach that uses CAD file information and direct sketch

Pros: Suitable for very large models with only a few functional entities (e.g., complex plastic injected parts)

Cons: All the constraints applied to the background image must be removed; otherwise, the tolerance analysis results could be incorrect

The best approach to choose depends on the complexity of the model and the user’s own preferences.

In all cases, Enventive Concept is not just another verification tool for use at the end of the design cycle, but rather a conceptual design tool that helps users discover issues before detailed design begins.

Enventive® Concept v4.2 rilasciato

Enventive® Concept v4.2 offre nuove funzionalità di modellazione e analisi a progettisti ed ingegneri

LANCASTER, Mass., 21 gennaio 2020 —Enventive Engineering, Inc. è lieta di annunciare il rilascio di Enventive® Concept v4.2, software di progettazione meccanica ed analisi delle tolleranze. Enventive Concept® aiuta ad immettere più velocemente sul mercato prodotti migliori ed a costi inferiori, identificando ed ottimizzando i parametri critici in una fase precoce del processo di progettazione.

Enventive® Concept v4.2 introduce molte nuove funzionalità e miglioramenti, tra cui:

  • Miglioramenti dell’analisi delle tolleranze – i report vengono ora generati in un foglio di calcolo integrato, che sostituisce Excel
  • Nuovo strumento di ottimizzazione
  • Supporto delle tolleranze standard DIN 16742, ISO 2768 ed ISO 8062
  • Possibilità di assegnare valori di Cp personalizzati, in base alla criticità della modalità di guasto, per i risultati “proiettati”
  • Miglioramenti di Monte Carlo – analisi della bontà dell’adattamento di Pearson sui risultati e nuovi tipi di distribuzione per i parametri contributori
  • Gestione migliorata della combinazione dei contributori duplicati
  • Nuova funzionalità di taglia / estendi
  • Possibilità di riordinare ed eliminare i livelli
  • Le tolleranze di concentricità vengono incasellate e visualizzate come tolleranze geometriche
  • Il Model Explorer adesso mostra i gradi di libertà per ogni componente in un assieme
  • Miglioramento dell’interfaccia utente – icone e caratteri scalabili per migliorare il supporto dei monitor ad alta definizione
  • Supporto migliorato per i riferimenti circolari
  • Strumento di specchiatura rivisto
  • Miglioramenti delle tolleranze di posizione per le elementi cilindrici / rettangolari in vista laterale
  • Ulteriori funzionalità di supporto per Enventive 360

Per i dettagli completi su questa nuova versione, gli attuali clienti possono fare riferimento alle “release notes” incluse in Enventive® Concept v4.2 .  Per richiedere miglioramenti per le versioni future contattateci.

Enventive Engineering’s Flagship Product Gets a New Name

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Enventive Engineering, Inc., Gives Flagship Product a New Name

LANCASTER, Mass., January 30, 2018—In response to adding two new products in 2018, Enventive Engineering, Inc., is giving its once-solo product—known simply as Enventive software—a new name: Enventive Concept.

Ralph Gifford, President and co-founder of Enventive Engineering, Inc., explained, “We’re making this change in response to Enventive Engineering’s recent growth. With two new products joining our lineup, our flagship product needs a name that identifies its fit in the product suite.” Enventive’s new product offerings, Enventive 360 and Enventive 3D&T, were officially announced at the Enventive User Group Meeting in October of last year. The initial production release of Enventive 360 is imminent, and Enventive 3D&T is soon to begin beta testing.

Strategically used during the conceptual design stage of product development, “Concept” is an apt moniker. “Along with its new name, Concept is gaining a new identity as an intrinsic part of a more comprehensive solution,” Gifford said.

“We’re entering into a new phase of growth,” Gifford continued, “Growth that has sprung organically from actively encouraging progressive change in the industry and supporting our customers’ goals to improve their entire engineering process, and ultimately their success.”

Enventive is continuing to make enhancements to Enventive Concept to respond to customers’ immediate needs as well as integrate it with their new products. Version 4.1.5, which primarily fixes issues found in 4.1.4, has just been released, and another new version of Enventive Concept that includes many enhancements and fixes based on customer feedback will be released later this year.

About Enventive Design Optimization Software

Enventive is a mechanical engineering design system that takes mechanical designs through every phase, from initial concept, to preliminary  design, to variational analysis and optimization.

By combining geometric, mathematical, and kinematic modeling with automated variation analysis, optimization capabilities, and GD&T simulation, Enventive enables engineers to simultaneously optimize critical parameter values and their tolerance limits, giving them greater insight into their products.

Enventive helps engineers understand how real world variances affect design before detailed design occurs, resulting in significant savings in time, effort and money.

About Enventive Engineering, Inc.

Enventive Engineering, Inc., is a privately held Delaware corporation, founded in 2002.

Enventive Engineering is dedicated to helping mechanical engineers succeed in the areas of design, analysis, and optimization by providing them with technologies that enable reliable identification of potential design problems early in product development.

Enventive Engineering develops, maintains and supports software distributed to companies in more than 30 countries representing a variety of fields, including automotive, aerospace/defense, medical devices, electrical components, office equipment, and appliances.