Industrial design
& smart manufacturing engineering in Torrance

Many products are designed to be assembled, not taken apart. Parts are glued, clips break on removal, screws hide under labels and batteries are welded in place. That keeps manufacturing simple, but it means a single failed part can send the whole product to the bin.

Repairability is becoming a commercial question as well as an ethical one. Right to repair laws are spreading in several US states and in Europe, covering electronics, appliances and farm equipment. Business buyers ask about service life and spare parts in tenders. Consumers read repair scores and reviews that mention whether a product can be fixed.

Design decides most of this. Which parts are likely to fail? Batteries, seals, buttons, hinges, filters, cables and connectors wear out long before the housing. If those parts can be reached and replaced with ordinary tools, the product can live for years longer.

Fasteners matter more than they seem. Standard screws in a small number of sizes let a technician open the product with a common kit. Glue and single use clips turn a simple repair into a destructive one. Where glue is needed for sealing, it can often be limited to a gasket that is sold as a spare.

Modular construction helps. A product built from a few sub assemblies, each with a clear function, is easier to diagnose and repair. A technician replaces a module rather than hunting for one failed component on a crowded board.

Access should follow wear. The parts that fail first should be closest to the surface. Nobody should need to remove the display to change a battery, or dismantle the motor housing to replace a filter.

Information completes the design. Exploded diagrams, part numbers and short repair guides make repair possible outside the factory. Marking parts with their number, directly on the moulding, helps a technician order the right spare years later.

Spare parts need a plan. How long will they be made? Where will they be stored? What will they cost compared with a new product? A part that exists but costs almost as much as a replacement does not change behaviour.

There are trade-offs. Screws take more assembly time than glue. Modules can add size and weight. Some sealed designs are safer or more water resistant. The answer is rarely all or nothing. It is a deliberate choice about which parts must be serviceable and which can stay sealed.

Decide early. Repairability added at the end of a project means compromises and redesign. Treated as a requirement from the first sketches, it shapes the structure of the product at little extra cost.

Test it. Ask a technician who did not design the product to replace the likely failure parts, and time it. Where they struggle, the design needs another look.

Materials play a part. Some plastics crack when a clip is opened more than a few times, while others tolerate repeated use. Threaded inserts in plastic parts allow screws to be removed and refitted without stripping the thread. These details decide whether a product survives its first repair or is damaged by it.

Electronics need particular care. Connectors instead of soldered wires, replaceable cables instead of cables moulded into the housing and batteries held by screws or pull tabs rather than strong adhesive all make service possible. Firmware matters too. Parts that are paired to one unit by software, so that a genuine replacement is refused, defeat the purpose of a repairable design.

Repairability also affects the business model. A product that can be serviced supports service contracts, refurbishment and resale programmes. Components recovered from returned units can be tested and reused. Designers who understand these plans early can shape the product to support them.

Consumables deserve the same thinking. Filters, blades, cartridges and seals should be easy to find and fit, with clear markings and no special tools. When users can replace these themselves, the product keeps working at its best and service calls fall.

Documentation for technicians should include torque values, the order of disassembly and the parts that must be replaced once opened. Without this, well meaning repairs introduce new faults.

Labelling inside the product helps more than people expect. Arrows showing the direction to slide a panel, numbers next to screws that must come out first and small warnings near sharp edges or stored energy make a repair safer and quicker. They cost almost nothing to add to a moulding or a printed circuit board during design.

Finally, track what actually fails. Returns, warranty claims and service records show which parts break and how. That data should feed the next version of the product, so the design keeps improving where it matters most.