From 12 Parts to 1: Using DfAM to Simplify Assemblies

“Part consolidation” is often presented as one of additive manufacturing’s greatest advantages. Take a complex assembly. Combine it into a single printed component. Reduce fasteners, eliminate joints, simplify supply chains. The narrative is compelling.

But it is also frequently misunderstood. Because reducing 12 parts to 1 is not, in itself, an achievement. The real question is “what problem are we actually solving?”

The Hidden Logic of Assemblies

Most multi-part assemblies exist for a reason. They are not arbitrary collections of components. They reflect the constraints of traditional manufacturing processes, such as machining limitations, tool access, material separation, thermal management, maintenance requirements, and assembly sequencing.

When these assemblies are transferred into additive manufacturing, there is a temptation to simply collapse them into a single geometry. And sometimes, that works, but often, it creates new problems.

Interfaces disappear, but so does access for machining. Fasteners are removed, but so is adjustability. Parts are combined, but tolerances become harder to control. Without understanding the function of each element in the original assembly, consolidation becomes superficial.

Consolidation Without Intent

This is where many DfAM workflows fall short. They treat part consolidation as a geometric exercise rather than an engineering one. Components are merged. Topology optimisation is applied. The result is lighter, more complex, and often less practical. The underlying issue is familiar. Geometry is being manipulated before the problem is fully understood.

As highlighted in our broader work on purposeful geometry, design must begin with intent, not with what the tool can generate, but with what the part must achieve.

Designing the System, Not the Part

At Metamorphic, we approach assembly simplification differently. We don’t start with the number of parts, but instead we start with the system. What functions need to be performed? How do loads move through the structure? Where are thermal gradients critical? What tolerances govern performance? How does the component interact with adjacent systems?

Only once these questions are answered do we define the architecture. Sometimes that leads to consolidation, sometimes it leads to modularity, and sometimes it leads to entirely new design paradigms. But in all cases, the outcome is intentional.

Complexity with Purpose

Additive manufacturing allows for the integration of functions that were previously separated across multiple components. Flow channels can be embedded within structural elements. Thermal management features can be integrated into load-bearing geometries. Interfaces can be redesigned rather than simply removed.

This is where true value lies. Not in reducing part count for its own sake, but in creating geometries where multiple functions coexist coherently. In this context, complexity is not decorative. It is purposeful. Every feature exists because it contributes to performance.

The Manufacturing Reality

Of course, consolidation introduces new challenges. Larger monolithic parts may be more sensitive to distortion. Internal features may complicate post-processing. Inspection and qualification become more complex. This is why manufacturability must be embedded from the outset.

At Metamorphic, we integrate process behaviour, machining strategies, and tolerance considerations directly into the design workflow. This includes anticipating deviation, understanding build orientation effects, and ensuring that the final geometry is not only functional, but manufacturable and scalable.

Because a single part that cannot be produced reliably is not an improvement over twelve that can.

The Commercial Perspective

Assembly simplification is often justified in terms of cost reduction. Fewer parts. Fewer suppliers. Fewer assembly steps. But the real commercial benefit comes from something deeper and includes reduced variability, improved performance, greater reliability, and shorter development cycles.

When DfAM is applied correctly, these outcomes compound. The result is not just a simpler assembly, but a more robust product.

Beyond the Numbers

“12 parts to 1” is a powerful story. But it is only meaningful when it reflects a deeper engineering transformation. At Metamorphic, we believe that DfAM should not be measured by how many parts are removed, but by how effectively function is integrated.

Because the goal is not fewer parts. The goal is better systems. And in additive manufacturing, that starts with designing the architecture, not just the geometry.