A working prototype does not automatically mean a product is ready for production. During the transition to series production, details emerge that are easily overlooked in the development phase. Small tolerances, material variations, or unclear specifications can suddenly have a major impact on cost and quality.
The trap of a “good enough” prototype
During prototyping, the focus is often on speed. Parts are manually adjusted, tolerances are temporarily ignored, and finishing is secondary. But once the same parts are produced in series, these small deviations accumulate into structural issues. Assemblies no longer fit as intended, assembly time increases, and suppliers are forced to make corrections.
Repeatability as the key to stability
A robust design accounts for reproducibility. This means:
• clearly defined tolerances and measurement points
• minimal dependence on manual adjustments
• consistent positioning and alignment
• clear specifications for coating and assembly
By standardizing these aspects early on, the transition from prototype to series production can take place without surprises.
The role of engineering in process stability
An engineer who bridges the gap between design and manufacturing prevents many revision cycles. By thinking in terms of processes — not just shapes — from the start, a product becomes not only functional, but also reproducible.
Series production demands repeatability, and repeatability starts with solid engineering.
