# Design of Personalized Devices--The Tradeoff between Individual Value and Personalization Workload
## 3 Results
### Examination of Variety-Oriented Product Design  
Just as the analysis of the variety-oriented product design followed the assessment of the internal and external variety in Section 3.1, this section once again reviews the product's compliance with the ideals of the _Design for variety_ method (see Section 2.1).  
It is worth noting that the _Diameter_ characteristic of the _Flow diverter mesh_ covered two differentiating properties. Likewise, the _Braid angle_ covered the wall apposition in both a curvature and a twist. Product tests conducted at the manufacturer's premises showed that the larger the braid angle, the better the compensation for a more pronounced twist. Targeted enlargement of the braid angle also has a positive effect on the wall apposition in pronounced curves. At the same time, up to a certain point, modifying the braid angle in this way has hardly any negative impact on the behavior when working with only a slightly pronounced curvature or twist. As such, the braid angle can be used to cover both differentiating properties without them contradicting one another. In terms of diameter, the attributes required at the proximal and distal ends often differ, which leads to a conflict when using just one characteristic in one component to deal with the differentiating properties _Wall apposition (distal)_ and _Wall apposition (proximal)_. This conflict now needs to be solved using a variety-oriented product design.  
Since the mesh is manufactured as a single component using a braiding process, it is not possible to break the _Flow diverter mesh_ component down into several smaller components. However, it is possible to carry out a _virtual segmentation_, a process after which different technical characteristics can be selected for each segment (see Figure 9) while still allowing the mesh to be braided as a single component using a coherent braiding process. In order to enable both a distal and a proximal wall apposition with one-to-one assignment, the _Flow diverter mesh_ component is divided into a _distal segment_ and a _proximal segment_. The diameter, length, and braiding angle can be selected individually for each segment. However, the number of wires and the wire thickness can only be selected for the distal segment. This is due to the continuous braiding process and the fact that this attribute is dependent on the smallest diameter. The thickness and the number of wires cannot be varied across the length of the braid, since a continuous braiding process is required in order to manufacture the mesh. Both characteristics are closely linked to the smallest diameter of the braid, since together, they determine the porosity of the mesh, which is important for the hemodynamics of the blood for the healing of the aneurysm.  
An additional segment is required for the transition from the distal segment to the proximal segment. Studies by [PERSON] et al. (2017) have shown that positioning the transition segment at the same level as the aneurysm has a positive effect on blood flow, and thus on the healing of the aneurysm. As such, the _aneurysm segment_ is defined in addition to the _proximal segment_ and _distal segment_ for the transition. It is only possible to vary the length  
Figure 9: Virtual segmentation of the component _Flow diverter mesh_ component into distal, aneurysm, and proximal segments in line with the ideals of variety-oriented product design.  
of the _aneurysm segment_. The other characteristics are derived from the other two segments. A segmented flow diverter can be created using a modular braiding mandrel, in which the segments of the tool can be plugged together [48].