de Haas -


de Haas - Engineering, Joeri de Haas, tel. +31-6-11843770, email:

Engineering services and capabilities


Below is a list of engineering services I can provide. These are conveniently listed according to product development maturity.  Please also find a list of technical experience and expertise under About me.

Visualize ideas, build conceptual 3D CAD models


When working on product development it is important to evaluate what the product could look like in an early stage. Not only to evaluate aesthetics but also to make sure that a feasible, functional design can be established in the available build space. Both by sketches and early CAD models an initial evaluation can quickly be made an presented.

If a project has distinct functional requirements regarding strength, flow performance or other physical aspects, it can be useful to start FEA assessments in an early stage of the development. Based on the results the feasibility of a certain development can quickly be determined.

The FEA models can be transferred onto more mature design levels later in the development process to assure that requirements can still be met as the design evolves towards production stages.

Conduct FEA/Simulation studies

Design, build and test prototypes


Apart from studying the virtual feasibility of a design, it is also essential to create and test prototypes in an early stage, for a better real-life, physical understanding of the design. Such parts or assemblies can be created by means of CNC machining, 3D printing, or otherwise.


Although I love the opportunity to utilize 3D printing, I don't  necessarily go for a hype and when technically better, I will of course also offer CNC machined parts, silicone molded or even injection molded parts from low cost (prototype) tooling.

Manufacturability of products is already an important aspect during earlier stages of development. As an example: for assemblies, already during the prototype and FEA/Simulation phases, it is necessary to consider (in a preliminary way) how components will be joined during series production. Joining of the individual components can be achieved by means of glueing, welding, fasteners, snap or press fits or otherwise.


However, when working towards the final, series design of the components and assemblies, the final choice for an assembly method should also be made. this enables and requires that the final geometry and dimensions are being documented in detail in order to make certain that manufacturability and quality are guaranteed. In the case of components, it is also necessary to take into account, for example, demoulding in the case of plastic parts or accessibility of machining tools for metal parts.


During this phase, some of the important topics are: FMEA (both design and production), geometric and dimensional tolerances, achieving and maintaining required CPK values on critical dimensions, Poka Yoke solutions, etc.



Initiate production processes


In parallel with product development, the production equipment and assembly processes must also be developed. These can be tools for producing components such as injection molds, cutting and pressing tools, extrusion dies, etc., as well as assembly lines. On these lines, the individual components are assembled in various stations along the line and tested, where necessary.


For example, joining components can be done by applying fasteners, press or click fits, welding, gluing etc. Testing can consist of leak tests, visual inspections, dimension checks, presence checks, etc.

Especially when starting up new production processes, attention should be paid to cycle times, scrap rate, CPK values and other quality-related topics.




Develop detailed, series design and production intent, CAD models and drawings