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Author Topic: THEORY OF TROUBLE SHOOTING  (Read 1938 times)

Offline rajevnaik

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THEORY OF TROUBLE SHOOTING
« on: 10/09/2014 12:53:13 »
FIRST TWO SENTENCES OF THE THEORY
Any man made or natural device, system or subsystem can be defined as a means by which movement, flow or transmission of any form of living being, material, mechanical component, any form of energy, money or information is enabled or controlled in desirable directions or is prevented in undesirable directions.
Whenever any trouble appears, the words desirable & undesirable get interchanged in above definition, from observerís perspective.


CONCLUSIONS
1. Any machine or mechanical system only behaves logically & logical reasoning is the only language by which a human mind can get inside information about any machine. Hence, if we develop our minds properly in this direction, we shall be able to TALK or CONVERSE with the machines.

2. At any particular time, any particular trouble will be caused by only one root cause just as any tree can have only one seed as its origin. There can never be two seeds, which have grown in to one tree, & similarly, there can never be two root causes for a particular trouble. In case there are apparently two root causes for a particular trouble, then there are chances that one is either an effect of another or is not really causing the trouble.

3. When ever any machine is having trouble, the trouble is the only measured and monitored parameter of the machine but it will definitely have some unknown effects due to root cause which are not so critically monitored.

4. Any non-conventional and peculiar trouble is the ultimate result of its ďGeneticĒ circumstances and hence each and every peculiar trouble is one of itís own kind. The data bank the manufacturers have can at best lead to statistical probability / possibility of some what similar reason in cases of
troubles which appear very frequently in the over all population.

5. All the tests, checks and allowable deviations or tolerances, which are done & measured by manufacturers, indicate only the health or status of the individual part at that time, but they can NOT give the exact cause and effect relationship of why a problem had arose without intervention of human mind.( Tests only show us how is it at present but can not directly tell why a particular trouble or peculiar observation has happened at all.)

6. Apart from the healthiness of components and parts being assembled of a troubleful machine, for deciding about Run / Repair /Replace, the biggest problem for the operating agency or user, who runs the machine is why exactly the critical trouble had occurred in the first place, so that same kind
of trouble must not recur again in the same or similar other machines in future.

7. The theory of trouble shooting can directly take the analystís mind to the root cause of the problem just like a guided missile reaches its target on its own.

8. One of the most outstanding features of this theory is that it can give the analystís confirmatory checks about correctness of the analysis during the analysis itself.

9. Any root cause analysis successfully done by any one any where so far IN THE WORLD is the result of INADVERTENT application of the same mental way of thinking which I have systematically researched & have laid down procedures & rules regarding same.

10. Any analysis made using this theory will lead to the solution to the trouble which will be most economical to implement since we can attack the root cause of the trouble directly without any trial & error.


Complete theory is larger than permitted attachment size so its link is given here with:
newbielink:http://www.scribd.com/doc/13748855/Theory-of-Trouble-Shooting [nonactive]



 

Offline alancalverd

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Re: THEORY OF TROUBLE SHOOTING
« Reply #1 on: 10/09/2014 17:24:05 »
No need for theory. Here's how it works for mechanical systems:

Is it supposed to move?

Yes. If it moves, no problem. If not, use WD40.

No. If it doesn't move, no problem. If it does, use duct tape.

Ask any aircraft mechanic.
 

Offline RD

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Re: THEORY OF TROUBLE SHOOTING
« Reply #2 on: 10/09/2014 22:11:41 »
... there can never be two root causes for a particular trouble ...

not necessarily ... http://en.wikipedia.org/wiki/Synergy#Drug_synergy

also ... http://en.wikipedia.org/wiki/Hickam%27s_dictum
« Last Edit: 10/09/2014 22:28:03 by RD »
 

Offline rajevnaik

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Re: THEORY OF TROUBLE SHOOTING
« Reply #3 on: 11/09/2014 11:57:05 »
... there can never be two root causes for a particular trouble ...

not necessarily ... newbielink:http://en.wikipedia.org/wiki/Synergy#Drug_synergy [nonactive]

also ... newbielink:http://en.wikipedia.org/wiki/Hickam%27s_dictum [nonactive]

Even in link provided by you, (Hickam's dictum) this statement is there which supports my theory:

"The principle of Occam's razor, or parsimony, does not demand that the diagnostician necessarily opt for the simplest explanation, but instead guides the medical practitioner to seek explanations, without unnecessary additional assumptions, which are capable of accounting for all relevant evidence."
 

Offline rajevnaik

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Re: THEORY OF TROUBLE SHOOTING
« Reply #4 on: 11/09/2014 12:04:06 »
No need for theory. Here's how it works for mechanical systems:

Is it supposed to move?

Yes. If it moves, no problem. If not, use WD40.

No. If it doesn't move, no problem. If it does, use duct tape.

Ask any aircraft mechanic.

It appears that you have not came across some real complicated trouble diagnosis in complex system & of-course, you have NOT READ MY THEORY from link provided.
 

Offline vampares

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Re: THEORY OF TROUBLE SHOOTING
« Reply #5 on: 21/09/2014 18:18:16 »
Trouble Shooting is common in electronics.  You have a circuit design and a physical circuit.  The circuit has a specific expected output.  The output is not what you expected.  (in this instance a transistor is shot).  You may have a reasonable expectation that a transistor is shot already, so would know how this would be presented (open circuit, closed circuit, etc.).

Ordinarily at this point I isolate each component to find the one that is not behaving as expected.  Just as every part was tested before assembly, test each part before disassembly.

Electronics texts will ask questions regarding TS circuits sometimes.  These are more for an understanding of the circuit design IMO.  Afterall the theoretical circuits are not real circuits.  Real circuits can have two problems.

OK so it takes all of 30 seconds to TS a small circuit.  If you don't TS the circuit at the first sign of trouble, you could spend all day with a broken circuit.  Maybe forever.

A computer mother board on the other hand Is going to be more difficult to TS. 
 

Offline vampares

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Re: THEORY OF TROUBLE SHOOTING
« Reply #6 on: 21/09/2014 18:28:44 »
TS is also very common in computer programing AKA debugging.  The solution is very much the same.  Every variable component of the program is output.  The component variable which is not as expected is backtraced in the coding to determine why.

Sometimes there is a total logic flaw.  You have to know where the logic breaks down however in order to fix it.

So it maybe necessary add some test code.  Sometime the test code can be very substantial depending on how many hand touch the code, etc.
« Last Edit: 21/09/2014 18:32:53 by vampares »
 

Offline vampares

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Re: THEORY OF TROUBLE SHOOTING
« Reply #7 on: 21/09/2014 18:55:12 »
Electronics and Computer programming are "perfect systems".  The access to the machinery and logic is readily available.

Sometimes the system is "imperfect".  Auto mechanics are notorious for doing unnecessary maintenance on vehicles.  It may be this was the only efficient way components could be isolated.  So this is not truly an example of "imperfect system" TS.

Imperfect systems may have been fashioned with "duct tape".  There is nothing wrong with this.  OK there is something wrong with this but we know this.  This is where bad designs go to die.  You can often expect your design to be trashed.  The key is that you are willing to do your own dirty work for a system which you value.  Presenting a system to others as more valuable, reliable or well-formed  than it is, is career suicide.  After all people are the problem when the problem is not solved.
« Last Edit: 21/09/2014 19:06:16 by vampares »
 

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Re: THEORY OF TROUBLE SHOOTING
« Reply #7 on: 21/09/2014 18:55:12 »

 

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