Mostrar mensagens com a etiqueta System Engineering. Mostrar todas as mensagens
Mostrar mensagens com a etiqueta System Engineering. Mostrar todas as mensagens

domingo, 16 de julho de 2017

Architecture: Cubesats explained

Modular architectures (highly reusable designs) allow for the creation of new market segments to explore. A good example are Cubesats:
https://www.space.com/29320-cubesats-spacecraft-tech-explained-infographic.html

Quoting:
"The CubeSat program began in 1999 as a collaboration between California Polytechnic State University and Stanford University. The goal was to design a standard for picosatellites, tiny Earth-orbiting boxes usually with a volume of about 61 cubic inches (1 liter) and a mass of about 2.9 lbs. (1.33 kilograms).

CubeSats are built in a variety of sizes, from 1U (one unit) up to three-plus units. Rails on the edges smooth the ride as the satellite is ejected from the P-POD deployer. Rectangular access doors are arrayed down the side of the satellite."

Architecture: Cutting down exploration costs through redesign

This is more related to Systems Engineering (not software Engineering) but is an interesting effort to drive down system costs (development and operation) through the development of a new, ground breaking architecture to explore the moon, and from there the solar system:
https://www.space.com/37464-moon-express-solar-system-exploration.html

Quoting:
"Therefore, the potential exists to cut space-exploration costs significantly — for example, by an order of magnitude or so on MX-9 missions, Richards said.

"That's when you get a radical price reduction — a collapse, really, of the costs down to hundreds of thousands of dollars a kilogram [of payload to the lunar surface] from the millions that it is today for smaller systems," he told Space.com. "I really hope that we're able to do for lunar access what cubesats did for access to low Earth orbit.""

quarta-feira, 12 de outubro de 2016

Product Design / System Engineering and the importance of standards - Samsung Galaxy Note 7

A very interesting article on product / system engineering / design and the importance of [international safety] standards.
From the Wall Street Journal:
http://www.wsj.com/articles/what-samsung-must-do-to-win-back-our-trust-1476218021?tesla=y

Read on and be appalled:
- There is no mandatory safety standard (in the US, in the EU) for mobile devices and since things could really catch fire (for instance on a plane) maybe there should be
- Sometimes the standards do exist but are not mandatory
- For some countries who deems a component or a phone all together suitable for a certain purpose is the company that produces it (really?)
- Components are subcontracted and due tot the secrecy involved (trade secrets are... secret), one company might not know what exactly is incorporating into its design (e.g. Batteries are certified / labeled by other companies; are all suppliers the same? Are all lots the same?)
- The problems can either come from hardware, or software but in the end, it doesn't really matter. Sometimes the recall chain is not giving you/collecting you the much needed information which is input for rework. This was a problem for Samsung (in the US) because it does not have a distribution chain in the US unlike Apple
- A compliance statements (the CE marking for instance) is just a statement by the manufacturer indicating they [think they] are compliant. Nobody checks it [before going into market - of course it will be checked after "something" goes wrong]. In fact most of the times there are no requirements for compliance testing (which is a different and safer thing, because some independent entity is analysing your work product)
- The fact that there is no word for re-recall: Because it rarely happens at such a scale, Samsung stopped the production (!). Nobody would trust on a recall of the recall. How many recalls would it take for Samsung to produce something that works properly as most products work (in terms of catching fire)?

The bottom line:
- Samsung shares are going down. There's talks of 15 K M EUR of losses.
- But worst than that: There's the image / reputation thing... Once lost it typically is like... Virginity.

So what do you think on the lack of process (and international standards) on product
/ system design? Is it a bore or is it much needed? We carry those things on the pocket of our trousers. Into planes. We are giving it to our kids...