The Whole Life of a Product
A product's environmental impacts include raw-material supply, manufacture, use and end-of-life handling. Design affects repair and material recovery. Actual impacts also depend on use, spare-part supply and waste services.
What a learner can do afterwards
- List the main stages of a product's life from raw-material supply to end-of-life handling
- Name a design choice that helps safe access to a worn part and explain why suitable spares also matter
- Explain why joined materials may need separating before recycling
- Describe evidence of repair barriers, distinguish it from proof of intent, and name evidence that tests a repairability claim
1 · Read
You have compared ways to make one item or many copies. Now follow a product beyond manufacture. A useful life-cycle model has four main stages: raw-material supply, manufacture, use and end of life. Transport can occur between stages. Materials and energy are used across the life cycle. The stage with the greatest environmental impact depends on the product and its use.
Follow an oil-based plastic straw. Extracted oil is processed to make plastic, then the plastic is shaped into a straw. After use, the route depends on local waste services. Acceptance of a plastic type does not mean every small object made from it can be sorted. Ordinary plastic straws can remain as waste or break into smaller pieces. Litter reaching water is environmental leakage, not a planned disposal route.
Repair needs safe access to a worn part, a suitable replacement and a way to fit it. Standard screws can help a case open without damage. Available spares and repair information also matter. A glued case can hinder access, but no single feature proves every repair is possible. Design affects repairability; later spare-part supply and repair services affect it too. Electrical repairs may need a qualified person.
Joined materials may need separating before recycling. Glue bonding metal to plastic can make separation harder. Battery types have different chemistries and collection rules. Ask an adult to check local instructions and an accepting service. Used lithium-ion batteries can cause fires in waste systems. Keep them out of general rubbish and household recycling bins. Do not open a battery or pry it from a device.
This is a route for a suitable recycling service, not an instruction to dismantle a battery.
Hold a product's making and end-of-life impacts fixed. Keeping it useful for ten years instead of two spreads that same total over more years, lowering its share per useful year. This does not prove every repair lowers total impact. Repair materials, operating energy and safety also matter. Compare options that provide the same service over the same period.
A sealed case and unavailable spares show repair barriers. They do not prove the maker wanted early failure. Check repair information, spare-part supply and price, and safe access to the worn part. A qualified person's successful repair using an available spare tests repairability more directly than an advert. That test concerns the part repaired; it does not prove every future fault can be fixed.
Follow the life cycle, check repair and recycling barriers, and compare the same useful service. Evidence of a repair barrier does not prove a maker's intention.
Lesson, questions and flashcards written for this dataset about product life cycles, repairability and material recovery.
Four readings written for this dataset about waste-system checks, battery collection, repair comparisons and repair barriers. The projector costs are invented examples.
More to read
A material code does not describe the whole waste system
A designer specifies an oil-based plastic drinking straw. Its material route begins with extracted oil, followed by plastic production and shaping. The product's story also includes transport, use and what happens when that use ends.
A material code identifies a type of plastic. It does not establish that a local recycling service accepts every object made from that plastic. Size and shape can affect sorting. The service's instructions are evidence about the available route; a code alone is not.
The design brief also needs to ask who will use the straw. Some people need a straw to drink safely or independently. An alternative must meet their needs. A reusable design also brings questions about cleaning and how often it will be used.
Compare designs that provide the required drinking service. Record the materials, repeated use, cleaning and collection arrangements assumed in the comparison. A change of material alone cannot answer all those questions. Plastic litter reaching a river is a loss from the waste system, not a planned recycling or disposal route.
Check the battery and the accepting service
The word battery covers products with different chemistries. They do not all contain the same metals or the same liquid chemicals. A collection route needs to match the battery type and the service's instructions.
A used lithium-ion phone battery can still cause a fire in waste handling. Keep it out of general rubbish and household recycling bins. Ask an adult to check current local guidance and contact a battery or electronics service that accepts it. A collection point for one battery type may not accept another.
If the battery remains inside a phone, check whether the service accepts the whole device. Do not open the battery or pry it out. For a damaged, swollen or leaking battery, ask an adult to obtain instructions from an appropriate service before handling or transport.
Design affects this final stage. Clear battery identification and information for qualified removal can help the collection and recovery system. Safe operation matters too. A design that allows trained repair staff to replace a battery is not an invitation to dismantle it at home.
Compare the same period of useful service
A school is comparing repair and replacement for a projector. A qualified technician must first check the fault and whether a repair can be made safely. The comparison is about providing the same classroom service over the next three years.
Suppose a repair quote is £80 and expected running costs over those years are £120. That option totals £200. A replacement quote is £240 with expected running costs of £60, giving £300. These invented figures include all costs in this model, assume equal classroom service and assume no value remains at the end. Under those assumptions, repair costs £100 less.
A real comparison needs to state what its estimates include. Further faults, maintenance, different useful lives and remaining value could change the result. A lower purchase price or one repair bill cannot describe all future costs.
The financial result is separate from the environmental result. That needs evidence about making the replacement, repair inputs, operating energy and end-of-life handling. The £100 saving in this model is not a measurement of an environmental saving.
Find what prevents a repair
A chair's covering has worn through. Before choosing a repair, check whether the frame remains safe and whether the covering can be replaced. Replacing fabric on a damaged frame would not address the whole problem.
The design may help through joints that allow access and components that can be replaced separately. Repair also depends on suitable materials, information, skills and cost. These conditions can change after the product was designed. An accessible part is of little help if no suitable replacement can be obtained.
A repair can keep an existing frame in use, but it still requires materials and work. A longer useful life spreads a fixed making impact across more service; it does not erase that impact or prove that every repair is preferable.
Keep observations separate from claims about intention. A joint that blocks access is evidence of a repair barrier. It does not tell you why the designer chose it. Record the barrier and ask what design records, spare-part information or repair tests would help answer the remaining questions.
2 · Watch
به انگلیسیTake it off screen
Where it sits
Optional connections
This opens up
Nothing builds on it yet.
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.