Design for manufacturing, maintenance, repair and disposal Manufacture, repair, maintenance and disposal - Disassembly — AQA A-Level Design and Technology: Product Design
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Design for manufacturing, maintenance, repair and disposal Manufacture, repair, maintenance and disposal - Disassembly explained
Designing for disassembly means planning from the outset how a product will be taken apart for repair, component recovery or disposal.
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The learner should explain three routes named in the specification. Integral fixings are features moulded or formed into parts, such as snap fits, so separate screws or adhesives are avoided and parts separate predictably. Active disassembly uses smart materials, for example a shape memory alloy (SMA) actuator that changes shape when heated and releases a joint without manual tools. Biodegradable parts break down at end of life, reducing the need to separate them. The learner should link each route to benefits such as faster dismantling, material recovery and reduced landfill, and note limitations such as cost or reliability.
Your focus
- Explain how integral fixings support disassembly.
- Describe active disassembly using a smart material such as an SMA.
- Evaluate how biodegradable parts and disassembly design affect end-of-life recovery.
Design for manufacturing, maintenance, repair and disposal Manufacture, repair, maintenance and disposal - Disassembly exam tips
Marking Points
- Explains designing for disassembly as planning how a product is taken apart for repair, recovery or disposal.
- Describes integral fixings, such as moulded snap fits, that allow parts to separate without separate fasteners or adhesives.
- Explains active disassembly using a smart material such as a shape memory alloy actuator that releases a joint when triggered.
- Describes biodegradable parts that break down at end of life and so reduce separation requirements.
- Links disassembly design to benefits such as material recovery, repair and reduced landfill, and notes a limitation.
Examiner Tips
- 💡Name all three routes: integral fixings, active disassembly and biodegradable parts.
- 💡Give a specific smart material example such as a shape memory alloy.
- 💡Explain the end-of-life or repair benefit of each route rather than only naming it.
Common Mistakes
- Describing disassembly only as recycling; correction: it also supports repair, maintenance and component recovery.
- Treating integral fixings as separate screws; correction: they are features formed into the parts themselves.
- Assuming active disassembly needs no trigger; correction: a stimulus such as heat activates the smart material.