hankrules2011

Book reviews, health, hockey, publishing, music

Fractional Factorials — WTF???

Posted by Scott Holstad on April 6, 2012

I’ve never felt so stupid as I have today. I’ve never read something and been unable to comprehend it … until now. I was reading Homer when I was 6. I read the Iliad 3 times before age 10! I’ve read books on electrical engineering, broadband networking, network engineering, existential philosophies, etc., etc. No problems. Well, I’ve been doing some transcription/editing contract work. I’ve spent the past two days working on a 6,000 word lecture on something called “fractional factorials.” I know nothing. This entire lecture, given by a native English speaker who has never heard of articles, subject/verb agreement, singular vs plural, etc., is so theoretical, there hasn’t been one concrete thing I can pick out in order to understand what the fuck he’s talking about!!! I finally found out via Google that it’s reliability engineering. I hadn’t known if it was engineering, math, or science, for God’s sake! Look at the beginning of the Wikipedia article on it:

_____________________________________

Fractional designs are expressed using the notation lk − p, where l is the number of levels of each factor investigated, k is the number of factors investigated, and p describes the size of the fraction of the full factorial used. Formally, p is the number of generators, assignments as to which effects or interactions are confounded, i.e., cannot be estimated independently of each other (see below). A design with p such generators is a 1/(lp) fraction of the full factorial design.

For example, a 25 − 2 design is 1/4 of a two level, five factor factorial design. Rather than the 32 runs that would be required for the full 25 factorial experiment, this experiment requires only eight runs.

In practice, one rarely encounters l > 2 levels in fractional factorial designs, since response surface methodology is a much more experimentally efficient way to determine the relationship between the experimental response and factors at multiple levels. In addition, the methodology to generate such designs for more than two levels is much more cumbersome.

______________________________________

SHIT!!! It’s utter gibberish. I’ve had 8 hours of this shit. My brain’s about to explode. I hope I never see anything on fractional factorials again!

One Response to “Fractional Factorials — WTF???”

  1. Glad that one’s done. Oh, and you just probably just expanded your brainpower by a million.

    Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

 
Cafe Book Bean

Talk Books. Drink Coffee.

Simple Living Over 50

Defining Life's Changes

The Book Review Directory

Over 150 Book Reviewer Bloggers Listed

Chaos Inc.

The Strange Happenings of a submissive "little"

A.D. Martin

writing - novels - film - television - video games - other stuff

In My Words

Life in my own words, my thoughts, my daily happenings, whatever....

Ravings of a Madman

(and other assorted things)

Crumpled Paper Cranes

Fumbling by Leisure, Singing to Cake

My Blog News And Blues Reviews

WHATEVER YOU'RE LOOKING FOR

I Read Encyclopedias for Fun

The official blog of Jay Dee Archer. Exploring new worlds, real and fictional.

Piece of Mind

Everything in my blog is sprinkled with wizard dust.

Kiss My Glass Boston

Wine, cocktails, whatever.

My Preconceived Life

trying to add another person to the planet

bluchickenninja.com

graphic designer, bibliophile, spoonie

Drunken Dragon Reviews

A Fantasy Blog Gone Horribly Wrong.

Lynette Noni

Embrace The Wonder

Megan Has OCD

About Mental Health, Daily Struggles, and Whatever Else Pops in My Head

Tropical Affair

Observations of the illusion through the eyes of wonder...

%d bloggers like this: