WEARABLE TECHNOLOGY


Breaking the prototyping paradox in electronics manufacturing


By David Russell, technology and innovation expert, PA Consulting F


or engineers tasked with turning wearable innovations into reliable products, the “prototyping paradox” is a stubborn barrier. Promising concepts often clear the early breadboard and demo phases, only to stumble in the so-called mid-volume stage – where expectations of quality, repeatability and regulatory performance meet the constraints of limited budgets and infrastructure. In wearable electronics manufacturing, bridging this gap requires precise validation, creative application of cross-sector techniques, and the cultivation of flexible, resilient processes.


Prioritising validation: Lessons from wearable prototyping


It’s tempting to focus on material efficiency and lowering the cost per unit right from the start. Yet, in practice, wearables – such as health monitors, fitness trackers, or smart patches – demand that process validation comes first. Even small inconsistencies in sensor calibration or substrate adhesion can escalate into widespread field failures or costly recalls once scaled. For example, during the development of flexible PCB assemblies for wristbands, rigorous early- stage testing, including destructive pull testing and environmental cycling, is critical to mapping out failure modes. Accepting higher initial material waste to nail these tests often proves less costly than discovering latent weaknesses after volume ramp-up. Similarly, when introducing new interconnect techniques like ultrasonic welding for fabric-embedded electrodes, engineers have found that capturing comprehensive process data, even if it means discarding more samples initially, ensures reliability before any push to optimise yield or automate manufacturing.


Translating solutions: Borrowing with purpose


Cross-sector knowledge transfer is a force multiplier for electronics manufacturing. Automation solutions designed for medical device dosing, such as high-precision programmable syringe pumps, have been seamlessly applied to wearable assembly, dispensing tiny, repeatable quantities of conductive adhesives onto intricate sensor


arrays. Algorithmic inspection systems, originally developed for telecom PCB fault detection, are now employed in wearables production to spot micro-cracks or cold joints in miniature soldered connections – crucial in devices exposed to continual movement and flex.


Likewise, thermal management methods refined in automotive power modules, like integrating phase-change materials or graphite heat spreaders, are now common in compact wearables to maintain safe processor and battery temperatures, particularly in sealed, water-resistant builds where passive airflow is severely constrained.


Cultivating flexible production lines While the vision of a fully automated manufacturing line is appealing, mid- volume runs for wearables rarely justify such investment from the outset. Instead, forward-thinking teams should leverage hybrid workcells, merging collaborative robots (cobots) for routine processes. For example, this could involve pick-and-place for miniaturised batteries or the alignment of micro-displays, with experienced technicians handling calibration, feedback-driven process tweaks and quality assurance. Rotary work tables inspired by bottling and packaging lines also enable parallel processing, boosting throughput by allowing components to cycle through assembly and inspection stages efficiently. Real-time process monitoring, enabled by integrated


sensors and analytics platforms, accelerates learning, shortens development cycles and highlights bottlenecks prone to automation in future expansions.


From prototype to production, smarter


These approaches have been proven to develop smarter products. As an example, we applied these rigorous prototyping principles when designing Viscero, a medical-grade, ECG monitoring vest designed for use outside of clinical settings. Printed electrodes and an ECG circuit system are integrated directly into clothing and paired with a compact pod device, which captures the wearer’s heart signals and motion data. By testing flexible electronics and textile integration early – and under realistic movement conditions – the system was designed for continuous monitoring over weeks or months, rather than short, intermittent readings typical of other ECG consumer devices.


For engineers shepherding wearables from prototype to market, breaking the prototyping paradox is about more than just scaling up. It’s about upholding rigorous validation, strategically adopting proven cross-industry solutions and designing production systems that flex as innovation advances. This disciplined, inventive mindset ensures that new ideas not only survive the mid-volume “grey zone” but thrive, reaching users as robust, manufacturable products.


MAY 2026 | ELECTRONICS FOR ENGINEERS


23


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50