Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
Etmax
User Rank
Rookie
re: According to George: The rules dont apply to us
Etmax   11/23/2011 2:48:40 PM
NO RATINGS
But isn't the verification part of the design process of the chip, rather than its manufacture? In automotive design the design is designed and verified not unlike a chip design is designed and verified. Aren't we designing parts and process so that volume production is a multiple of the same? The design process happens only once, so that process has to contain significant verification. Maybe I'm missing something here??

Duane Benson
User Rank
Blogger
re: According to George: The rules dont apply to us
Duane Benson   10/31/2011 4:50:35 AM
NO RATINGS
Is it possible that the complexity of a big chip is simply beyond the tools of the time? An airplane can have its wing spar tested. It can have FEA performed on fasteners. It can have the shape tested in a wind tunnel or in a simulator. According to the Boeing web site, there are six million parts in a 747 with half being fasteners. The 747 has a pretty good record of having quality designed in as well as a good record of test and inspection. Does it matter that all of the parts are big enough to hold in your hand? Modern CPUs have transistor counts of 3/4 of a billion and up. FPGAs and memory chips get up in to the multiple billions. I can see some functional blocks as being relatively easy to both design quality in and verify after the fact (memory), but other sections, the complexity is just mind-boggling. Design schedules are likely a big factor as well. Designers are far too often simply not given enough days on the calendar to spend the time necessary to design enough quality in at the start.

cdhmanning
User Rank
Rookie
re: According to George: The rules dont apply to us
cdhmanning   10/30/2011 6:40:19 PM
NO RATINGS
From 50,000 ft all design domains (ie. automotive, chip, software, bridges) share some characteristics. What differs though is the cost or verification and testing vs the cost of error. It is, however, important to draw the distinction between design testing/verification and per-unit verification testing. Verification of the design of a chip or a new car model is very different to testing each individual chip or car on the line. We can do "unit testing" on everything from cables and bolts to parts of a chip design to software.We can also do integration testing on sub-assemblies of the above. However the cost/value trade off of doing these tests is differenc across different domains. Where the difference shows up is in the cost of a "do over". In software and chip design, the cost of constructing a sub-assembly to test partial assembly is relatively cheap (assuming you can use an FPGA for the chip testing). When building a bridge that is not the case. So while it is interesting to have a look at different ideas and look for opportunities for cross pollenation, it is not a given that they will be beneficial.



Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Book Review: Deadly Odds by Allen Wyler
Max Maxfield
11 comments
Generally speaking, when it comes to settling down with a good book, I tend to gravitate towards science fiction and science fantasy. Having said this, I do spend a lot of time reading ...

Martin Rowe

No 2014 Punkin Chunkin, What Will You Do?
Martin Rowe
1 Comment
American Thanksgiving is next week, and while some people watch (American) football all day, the real competition on TV has become Punkin Chunkin. But there will be no Punkin Chunkin on TV ...

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
13 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Martin Rowe

Book Review: Controlling Radiated Emissions by Design
Martin Rowe
1 Comment
Controlling Radiated Emissions by Design, Third Edition, by Michel Mardiguian. Contributions by Donald L. Sweeney and Roger Swanberg. List price: $89.99 (e-book), $119 (hardcover).