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Opposite of Redundant?

Original Post
Sam Skovgaard · · Tucson, AZ · Joined Oct 2017 · Points: 92

We all like having redundancy in our systems, where the failure of a single component does not cause catastrophic failure.

What word would you use to describe the opposite of redundant?  Where failure of any component of a multi-component system causes catastrophe?  I can't seem to think of a word in the English language to describe this concept.

Here is an example of what I'm talking about.  In this rappel setup, failure of either bolt means decking.  

Ryan Dresser · · Ft Collins, CO · Joined Mar 2017 · Points: 40

UNdundant. 

FrankPS · · Atascadero, CA · Joined Nov 2009 · Points: 275

So if you don't put the rope through the ring, that's a problem? Um, maybe a better example would help spur conversation. The setup in the photo is absurd.

Edit: Sam, are you aware of how to use the inline bolts in the photo for rappeling?

Clint Cummins · · Palo Alto, CA · Joined Jan 2007 · Points: 1,176

Dependent, but there's probably a better word.

Something about how the failure of "any link in a chain" causes disaster.

Your photo is quite a laugher! - shows how dumb some people really are.
Or it's a troll.
Almost as bad as toproping through slings with no biner.

Erroneous Publicus · · Unknown Hometown · Joined Jun 2010 · Points: 5

unique

James Sevigny · · Unknown Hometown · Joined Sep 2019 · Points: 0

Part of a system without redundancies are considered to be a single point failure. 

Rock Lasagna · · Unknown Hometown · Joined Sep 2019 · Points: 0

Yergonnadieant.

Sam Skovgaard · · Tucson, AZ · Joined Oct 2017 · Points: 92
FrankPS wrote: So if you don't put the rope through the ring, that's a problem? Um, maybe a better example would help spur conversation. The setup in the photo is absurd.

Edit: Sam, are you aware of how to use the inline bolts in the photo for rappeling?

For everyone else having trouble keeping up, I'll make things more clear.

1)Yes, this pictured setup IS absurd, that's my point.  This pic actually comes from the Un-Belay-vable series on climbing.com

2)In the pictured setup, if either bolt fails, you fall.  If instead the rope were threaded through through the ring, if either of the bolts fail you live (a redundant system)

3) Yes, Frank, I am aware how to use inline bolts for raps.
Bill Lawry · · Albuquerque, NM · Joined Apr 2006 · Points: 1,696
James Sevigny wrote: Part of a system without redundancies are considered to be a single point failure. 

This

Dave K · · San Diego · Joined Jul 2019 · Points: 0

Interesting question. I'm an engineer that works with systems that use redundancy to minimize failures and it's bugging me that I'm not aware of any term for the characteristic you are describing.

I agree that some responses suggest that readers don't see what you are saying: In the OP example, the system is being used in a way such that having two bolts increases the the probability of total failure. Yes, it can fail at any single point, but there's more to it than that; there are unnecessary multiple points of failure that cumulatively increase the overall probability of total failure. Of course the bolt and chain aren't designed to be used that way and it's really operator error that introduces the additional risk.

An example that is similar but maybe less absurd would be a toprope setup with one sling clipped into two bolts where the masterpoint carabiner is clipped across the sling such that either bolt failing would cause the anchor to fail.  But I don't know what to call it, except really wrong.

Rod Shaftmoore · · Boulder, CO · Joined May 2008 · Points: 100

...non-redundant.

Andy Hansen · · Longmont, CO · Joined Sep 2009 · Points: 2,602

Etymologically speaking redundant doesn’t have a prefix and therefore a word like “dundant” doesn’t exist. I think words like unique, essential or more superfluously “single point of failure” in this context are appropriate. 

Andrew Rational · · Unknown Hometown · Joined Aug 2018 · Points: 10

Negligent.

JohnReg · · Unknown Hometown · Joined Oct 2015 · Points: 15

Obviously Single Point Failure is best because it can be abbreviated SPF and then we can rank possible failure in terms of likelihood, say SPF10 SPF20 SPF30 etc.

M Mobes · · Unknown Hometown · Joined Mar 2006 · Points: 910

Single point failure encompasses America. Don't be an SPF

Nathan Sullivan · · Fort Collins, CO · Joined Sep 2018 · Points: 0

Janky.

rgold · · Poughkeepsie, NY · Joined Feb 2008 · Points: 526

The mathematics term "irredundant" would work in the anchor context.

Dave K · · San Diego · Joined Jul 2019 · Points: 0

In the OP configuration, having two bolts is actually worse than having only one.

Is there a way to create an anchor where having three is worse than having two? I can't think of a way to do that. I believe you would need a sling with three ends...

Ron O · · middle of nowhere, southern… · Joined Apr 2018 · Points: 0

Swedish rigged (they have the highest suicide rate). 

JohnReg · · Unknown Hometown · Joined Oct 2015 · Points: 15
Nathan Sullivan wrote: Janky.

I've changed my mind. I throw my support behind Janky.

Shaniac · · Unknown Hometown · Joined Jul 2016 · Points: 14
Sam Skovgaard wrote: What word would you use to describe the opposite of redundant?  
dispensable : - ) 
Guideline #1: Don't be a jerk.

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