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# Murphy's Law

Murphy's law

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### Murphy's Law

1. 1. If anything can go If anything can go wrong, it will wrong, it will Murphy’s Law Murphy’s Law Murphy’s Law If there is a possibility If there is a possibility If nothing can just go If nothing can just go of several things going of several things going wrong, it will anyway wrong, it will anyway wrong, the one that will wrong, the one that will cause the most damage cause the most damage will be the first one to will be the first one to go wrong go wrong Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Page 1 Murphy’s Law If there are 4 possible If there are 4 possible Left to themselves, Left to themselves, ways in which something ways in which something things tend to go from things tend to go from can go wrong, and you can go wrong, and you bad to worse bad to worse circumvent these, then a circumvent these, then a 5th way, unprepared 5th way, unprepared for, will immediately for, will immediately occur occur Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law
2. 2. If things seem to be If things seem to be Nature always sides Nature always sides going well, you have going well, you have with the hidden flaw with the hidden flaw obviously overlooked obviously overlooked something something Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law O'Toole's Commentary O'Toole's Commentary Ginsberg's Theorems Ginsberg's Theorems on Murphy's Laws - on Murphy's Laws - •you can't win •you can't win Murphy was an Murphy was an •you can't break even •you can't break even optimist optimist •you can't even •you can't even quit the game quit the game Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Page 2 Murphy’s Law Forsyth's Second Corollary Forsyth's Second Corollary Weiler's Law - nothing Weiler's Law - nothing to Murphy's Law - just to Murphy's Law - just is impossible for the is impossible for the when when person who doesn't have person who doesn't have you can see the light at you can see the light at to do it themself to do it themself the end of the tunnel, the the end of the tunnel, the roof caves in. roof caves in. Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law
3. 3. The Laws of Computer The Laws of Computer Any given program costs Any given program costs Programming - any given Programming - any given more and takes longer more and takes longer program, when running, program, when running, each time it is run each time it is run is obsolete is obsolete Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law If a program is useful, If a program is useful, If a program is useless, If a program is useless, it will have to be it will have to be it will have to be it will have to be replaced replaced upgraded upgraded Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Page 3 Murphy’s Law Any given program will Any given program will The value of a program The value of a program expand to over-fill the expand to over-fill the is inversely proportional is inversely proportional available memory available memory to the amount it costs to the amount it costs Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law
4. 4. Program complexity Program complexity Addition to Murphy's Addition to Murphy's grows until it exceeds grows until it exceeds Law - in nature, nothing Law - in nature, nothing the capability of the the capability of the is ever right, therefore, is ever right, therefore, programmer who must programmer who must if everything is going if everything is going maintain it maintain it right... something is right... something is wrong wrong Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Brook's Law - if at Brook's Law - if at Grosch's Law costs Grosch's Law costs first you don't succeed, first you don't succeed, increase as the square increase as the square hire a consultant hire a consultant of the computing power of the computing power Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Golub's Laws of Golub's Laws 4 Page of A Murphy’s Law planned A carelessly planned carelessly Computerdumb - fuzzy Computerdumb - fuzzy project takes 3 times project takes 3 times project objectives are project objectives are longer to complete than longer to complete than used to avoid the used to avoid the embarrassment of expected; a carefully expected; a carefully embarrassment of estimating the estimating the planned project takes planned project takes corresponding costs corresponding costs five times as long five times as long Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law
5. 5. Osborn's Law: variables Osborn's Law: variables To err is human, won't; constraints aren't won't; constraints aren't but to really screw up you need a computer Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Any system that Any system that Gubarsky's Law of Gubarsky's Law of depends on human depends on human Cybernetic Entomology: Cybernetic Entomology: reliability is unreliable reliability is unreliable there's always at least there's always at least one more bug one more bug Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Page 5 Murphy’s Law Groutman's Postulate: Groutman's Postulate: It won’t be until a It won’t be until a profanity is the one profanity is the one program has been in program has been in language understood by language understood by production for 6 production for 6 months the the most months the the most all programmers all programmers harmful error will be harmful error will be discovered discovered Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law
6. 6. Cables & card that Cables & card that Switchable cables won't. Switchable cables won't. absolutely can’t be absolutely can’t be connected in the wrong connected in the wrong way will be way will be Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Weinberg's Second Law of Weinberg's Second Law of Sumperson's Law: the Sumperson's Law: the Relativity: if builders built Relativity: if builders built probability of anything probability of anything buildings the way buildings the way happening is in inverse happening is in inverse programmers wrote programmers wrote ratio to its desirability ratio to its desirability programs, then the first programs, then the first or need or need woodpecker that came along woodpecker that came along would destroy civilization would destroy civilization Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Page 6 Symurgy's Law Law of Symurgy's 1st Law of Murphy’s 1st Gummidge's Law: the Gummidge's Law: the Evolving System Dynamics: Evolving System Dynamics: amount of expertise amount of expertise once you open a can of once you open a can of varies in inverse varies in inverse worms, the only way to worms, the only way to proportion to the number proportion to the number recan them is to use a recan them is to use a of of larger can- old worms larger can- old worms statements understood never die, they just worm never die, they just worm statements understood their way into larger cans their way into larger cans by the general public Law by the general public Law Murphy’s Murphy’s Murphy’s Law Murphy’s Law
7. 7. Harvard's Law, as applied Harvard's Law, as applied Battinger's Law: it Battinger's Law: it to computers: under the to computers: under the most rigorously controlled most rigorously controlled works better if you plug works better if you plug conditions of pressure, conditions of pressure, it in it in temperature, volume, temperature, volume, humidity, and other humidity, and other variables, the computer will variables, the computer will do as it damn well pleases do as it damn well pleases Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Henkinson's Law: But Henkinson's Law: But Koerner's Five Thumb Koerner's Five Thumb even then it won't work even then it won't work Postulate: experience Postulate: experience varies directly with varies directly with equipment ruined equipment ruined Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Page 7 Murphy’s Law Cheop's Law: nothing Cheop's Law: nothing Beaumont's Rule of Beaumont's Rule of ever gets built on ever gets built on Accuracy: when working Accuracy: when working time or within budget time or within budget toward the solution of a toward the solution of a problem, it always helps problem, it always helps if you know the answer if you know the answer Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law
8. 8. Wymurg's 7th Exception Wymurg's 7th Exception Fudder's Laws: Fudder's Laws: to Murphy's Law: when to Murphy's Law: when anything that begin anything that begin it rains it floods it rains it floods well ends badly, well ends badly, anything that begins anything that begins badly ends worse badly ends worse Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Westheimer's Rule: to estimate Westheimer's Rule: to estimate the time it takes to do a task, the time it takes to do a task, Stockmayer's Stockmayer's estimate the time you think it estimate the time you think it Theorem: Theorem: should take, multiply by 2 and should take, multiply by 2 and change the unit of measure to change the unit of measure to if it looks easy, it's if it looks easy, it's the next highest unit. Thus we the next highest unit. Thus we tough. If it looks tough. If it looks allocate 2 days for a 1 hour task allocate 2 days for a 1 hour task tough, it's damn near tough, it's damn near impossible impossible Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Page 8 Johnson's Law Johnson's Third Law: If Murphy’s Third Law: If Atwood's Corollary: No Atwood's Corollary: No you miss one issue of any you miss one issue of any books are lost by books are lost by magazine, it will be the magazine, it will be the lending except those lending except those issue that contains the issue that contains the you particularly needed you particularly needed article, story, information, article, story, information, or installment that you or installment that you to keep to keep were most anxious to read were most anxious to read Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law
9. 9. Corollary of Johnson's Corollary of Johnson's Harper's Magazine Harper's Magazine Third Law: All of your Third Law: All of your Law: You never find Law: You never find friends either missed friends either missed the article until you the article until you it, lost it or threw it it, lost it or threw it replace the equipment replace the equipment out out Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Brooke's Law: Adding Brooke's Law: Adding Nagle's Fourth Law: Nagle's Fourth Law: manpower to a late manpower to a late Once a job is fouled Once a job is fouled project makes it project makes it up, anything done to up, anything done to even later even later improve it will only improve it will only make it worse make it worse Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law Flap's Law: Any inanimate Flap's Law: Any inanimate Page 9 Murphy’s Law Heatherkile's Rule: object, regardless of its object, regardless of its Heatherkile's Rule: position, configuration, or position, configuration, or Whatever you did, Whatever you did, purpose, may be expected to purpose, may be expected to that's what you planned that's what you planned perform at any time in a perform at any time in a totally unexpected manner for totally unexpected manner for reasons that are either reasons that are either entirely obscure or else entirely obscure or else completely mysterious. completely mysterious. Murphy’s Law Murphy’s Law Murphy’s Law Murphy’s Law
10. 10. Jukes' Axiom: The Jukes' Axiom: The number of potholes in number of potholes in Collins' Law: If you can't Collins' Law: If you can't the road or speed make a mistake, you make a mistake, you the road or speed bumps in the parking lot can't make anything. can't make anything. bumps in the parking lot proportionally increases proportionally increases in relation to the in relation to the amount of data stored amount of data stored on the hard drive Murphy’s Law in on the hard drive Murphy’s Law in Murphy’s Law Murphy’s Law If I'm being stupid, that's If I'm being stupid, that's Rabinovitch's Rules of Rabinovitch's Rules of my problem. my problem. Sane Dialogue: Everyone Sane Dialogue: Everyone If my being stupid makes If my being stupid makes who matters is stupid who matters is stupid you stupid, that's your you stupid, that's your now and then now and then problem. problem. If you think you're never If you think you're never Murphy’s Law Murphy’s Law stupid, boy are you stupid! Law stupid, boy are you stupid! Law Murphy’s Murphy’s Page 10 Murphy’s Law

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• #### amit1990jks

Feb. 15, 2016
• #### LubasiSimangolwa

Dec. 14, 2020

Murphy's law

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