Design for manufacture
Design & Technology · Key Stage 3 · The School
What design for manufacture means
DESIGN FOR MANUFACTURE (DfM) means designing a product so it can be made efficiently. Fewer separate parts. Simpler assembly steps. Materials and processes the factory can actually handle well. This gets thought about from the very start of the design, not added on afterward.
Reducing the number of parts
Every separate part in a product must be made, handled, stored and put together. Each of those steps costs time and money. A design that does the same job with fewer parts — say, one moulded piece doing what three screwed-together pieces did — is usually both cheaper to make and less likely to fail, since there are fewer joints that could go wrong.
Designing for the assembly method
A part built for robotic assembly needs different features from one built for assembly by hand. Clear shape cues, so a robot arm cannot fit it in the wrong way round, matter far more for a robot than for a person, who can just look and fix a mistake.
An original design uses six separate plastic parts, held together with eight screws. A worker must line up and fasten each one by hand. A DESIGN-FOR-MANUFACTURE redesign merges four of those six parts into one moulded piece with built-in SNAP-FIT clips. This cuts the screw count from eight down to two, and the assembly steps from about twelve down to four. The product still does exactly the same job for the user, who notices no difference at all in how it works. But the time to make each one drops sharply. Fewer parts need to be stocked and tracked. And fewer joints remain that could fail later in use. The function stayed the same. The cost and reliability of making it did not — purely because manufacture was part of the DESIGN itself from the start, not a problem left for the factory to work around later.