I am assuming you are an ee (like myself)...I have never designed a product with a built in expiration, nor have I ever seen any app notes or write ups on the engineering of it - something engineers love to do.
What I have seen done is cheaping out on parts in order to get the price as low as possible, because customers shop primarily on price.
Not to lash out, but it kind of hits a nerve for me, because people think we design products to purposely fail. Hell no, we try really hard to do the opposite, but everyone just loves to buy the cheapest shit.
The $25 LED bulb that will last for eternity will rot on the shelf next to the $3 bulb that will probably be dead in 6 months. And one more "they build these things to fail" complaint will be posted online.
To be fair this is hardly limited to EE and is the issue with the race to the bottom in all product categories. Make long-lasting high-quality 100$ pants? People prefer spending 10$ on Shein.
Additionally, the issue is that as a consumer, it's not easy to differentiate between quality markup and greedy markup. I don't see the cap manufacturer on the box so the 25$ light bulb might last 10 years or it might last 6 months just like the 3$ one. At least with the 3$ one I can come back and buy another...
I agree with what you said - engineers do the best they can with the budget but the budget is small because people won’t pay for things that last - but it’s worth saying that any boards with electrolytic capacitors have an inherent built in expiration. Any product with rubber has an expiration. Any product with permanent batteries, glued or sealed assemblies, or no spare parts. Much of that is with the customer’s budget, sure. But these days, even among expensive things, nearly nothing is built to last.
Not LED light bulbs specifically, but...
"The Phoebus cartel engineered a shorter-lived lightbulb and gave birth to planned obsolescence"
It's true that the Phoebus cartel arranged to have light bulbs die after a certain number of hours, but bulb lifetime is a trade off between lumens, filament life, and energy consumption. The cartel-defined lifetime limit sits very close to the sweet spot for all of those metrics for incandescent bulbs.
Technology Connections explained this well in a video about a year ago: https://youtu.be/zb7Bs98KmnY
I seriously doubt it's ever a deliberate conspiracy in engineering apart from shenanigans like what happened at VW, but it's net effect of product managers, accountants, and contract manufacturers who modify PCBs and BOMs after it's passed off to them to save money on retail products. And so it's likely unintentional with negligence, but it benefits the company. Except for some Samsung appliances made ~ 2010-2014 which seemed to fail just after their warranties expired. I suspect highly-optimized designs for "consumables" like incandescent lightbulbs and parts for cars use data to tweak design life, more often than not, in their favor. And, with the pressures of multinational oligopolies and BlackRock/Vanguard/State Street.. there is little incentive to invest $100M into a moderately-superior incandescent lightbulb using yesterday's technology that lasts 100kh and 5k cycles and sells for $1 more than the next one. Maybe if we (perhaps a science/engineering nonprofit thinktank that spanned the world and gave away designs and manufacturing expertise) had quasi-communism for R&D, we could have very nice things.
It's not my fault if other people are too dumb to comprehend TCO because I would buy the $25 bulb if it had a 30 year warranty.
> Except for some Samsung appliances made ~ 2010-2014 which seemed to fail just after their warranties expired.
And? That just sounds like they have good engineers. If you are designing a machine, you have an target lifetime. You'd obviously want the product to last through the warranty period, because warranty claims are a cost to the company.
Every choice of a component affects lifetime. Designers of mass-market products can't just use premium components everywhere -- the mass market will not pay steep premiums for otherwise equivalent products.
Value engineering and planned obsolescence are not the same thing, but they are often confused.
That being said, Samsung appliances suck and I hate them. Mine failed within warranty several times.
> And, with the pressures of multinational oligopolies and BlackRock/Vanguard/State Street.. there is little incentive to invest $100M into a moderately-superior incandescent lightbulb using yesterday's technology that lasts 100kh and 5k cycles and sells for $1 more than the next one.
It isn't that. It's pressure at the shelf that does it. Consumers behavior simply does not reward equivalent-feature products with premium components that claim (true or not) to have a longer lifespan. Unfortunately, they will buy based on their uninformed sense of quality first.
If you release a light bulb that is identical to the best selling one on the shelf, but claims 10x lifespan, your competitor will do something like gluing a weight in theirs, putting some marketing BS on the box, and will put you out of business. Consumers just don't pick products based on actual quality.
You're making a pretty awkward value judgement about what a "good" engineer is, but you're describing an unethical one with a bizword like "value engineering". I realize ethics are no longer understood by much of Western society because the culture teaches transactionality, worships trickle-down economics and greed, and hyperindividualism.
> It isn't that. It's pressure at the shelf that does it. Consumers behavior simply does not reward equivalent-feature products with premium components that claim (true or not) to have a longer lifespan. Unfortunately, they will buy based on their uninformed sense of quality first.
This is a failure of marketing and buzz of the sales channel(s) and manufacturers to educate properly, not the failure of the customer.
A good engineer is one that has a job, doesn't put their employer out of business, and produces work that fulfills the requirements they're given.
Many people think there's some unethical conspiracy going on, and consumers actually want a product that lasts a long time, but companies are refusing to give it to them. But this is projection of individual preferences on to the market as a whole. Consumers want cheap shit that is in fashion, and their buying preferences prove this time and again. Maybe you want a 50 year old toaster in your kitchen, other people are buying products based on other factors.
If consumers really wanted to pay a premium for high duty-cycle equipment with premium lifespans, they can already do that by buying commercial grade equipment. But they don't.
If you are familiar with the history of home appliances, you'd probably come to appreciate the phrase 'value engineering'. Even poor people can afford basic electric appliances now because of the ingenuous ways that engineers have designed surprisingly usable appliances out of very minimal and efficient designs.
If you look at ads for electric toasters 100 years ago, you'd see they cost over $300 in today's money adjusted for inflation. Thank god for value engineering.
A good engineer provides value to society. If they fulfill requirements that are bad for others then they are not good engineers.
I seems to me that there is also a social dynamic to things. If consumer grade products become a race to the bottom then it is going to become more difficult for regular people to purchase products which aren't low quality. There's also a degree to which society (e.g. in the form of government policy, cost of living adjustments, etc.) factors in differences in prices.
The fact that poor people can now afford to own some household appliances isn't a huge value to society?
It completely changed the way our societies operate. I think it is a good thing that people have the option to buy crappy washing machines, rather than being forced to use the washboard and bucket my grandmother used. Yeah, they sometimes do develop a bad belt, or the timer mechanism might fail. But it beats being unwillingly forced into homemaking as a career.
The world only has so much wealth to go around, and that isn't the moral quandary of the engineer picking an item on a BOM on Tuesday morning to fix. If anything, squeezing a few more pennies out of that BOM is going to lift some people at the fringes out of poverty. At the opposite end of the product value equation, every unused and functional component in every product that is no longer in service, is wealth that is wasted that could have been spent elsewhere.
Engineers are to consider public safety first. This is not negotiable for real hardware engineering. Poor people could always purchase used appliances.
I agree that products shouldn't be unsafe. And value engineering does not mean making products unsafe.
> Poor people could always purchase used appliances.
The reality in mid 20th century US demonstrates this isn't the case. Most went without the modern appliances that are commonplace today.