SlideShare a Scribd company logo
Worse Is Better,
for Better or for Worse
@KevlinHenney
Worse Is Better, for Better or for Worse
Worse Is Better, for Better or for Worse
There are a thousand thoughts lying
within a man that he does not know
till he takes up the pen to write.
William Thackeray
Stop Overpromising and Overshooting
We want to do everything all at once. Grand plans!
Sweeping gestures! Epic 23-book fantasy cycles! Don’t
overreach. Concentrate on what you can complete.
Temper risk with reality.
Chuck Wendig
http://terribleminds.com/ramble/2012/01/03/25-things-writers-should-stop-doing/
You have to finish things —
that's what you learn from,
you learn by finishing things.
Neil Gaiman
Worse Is Better, for Better or for Worse
In 1990 I proposed a theory, called
Worse Is Better, of why software would
be more likely to succeed if it was
developed with minimal invention.
It is far better to have an underfeatured
product that is rock solid, fast, and
small than one that covers what an
expert would consider the complete
requirements.
The "good enough software" concept
popularized by Yourdon.
In many senses, it's just a rationalization
of what's happening in the software
world: the first company hitting the
market with a feature-rich product is
more likely to win the battle than the
careful, quality-seeking company.
Carlo Pescio
http://www.eptacom.net/pubblicazioni/pub_eng/wirth.html
"Good enough software" is rarely good
enough.
Niklaus Wirth
http://www.eptacom.net/pubblicazioni/pub_eng/wirth.html
The following is a characterization of the
contrasting [the right thing] design philosophy:
 Simplicity: The design is simple [...].
Simplicity of implementation is irrelevant.
 Completeness: The design covers as many
important situations as possible. All
reasonably expected cases must be covered.
 Correctness: The design is correct in all
observable aspects.
 Consistency: The design is thoroughly
consistent. A design is allowed to be slightly
less simple and less complete in order to
avoid inconsistency. Consistency is as
important as correctness.
Here are the characteristics of a worse-is-better
software design:
 Simplicity: The design is simple in
implementation. The interface should be
simple, but anything adequate will do.
 Completeness: The design covers only
necessary situations. Completeness can be
sacrificed in favor of any other quality.
 Correctness: The design is correct in all
observable aspects.
 Consistency: The design is consistent as far
as it goes. Consistency is less of a problem
because you always choose the smallest
scope for the first implementation.
Implementation characteristics are foremost:
 The implementation should be fast.
 It should be small.
 It should interoperate with the programs
and tools that the expected users are
already using.
 It should be bug-free, and if that requires
implementing fewer features, do it.
 It should use parsimonious abstractions as
long as they don’t get in the way.
Worse Is Better, for Better or for Worse
The more specific a
design idea is, the
greater its appeal is
likely to be.
#!/usr/bin/perl
# -------------------------------------------------------- PerlInterpreter
# PerlInterpreter must be the first line of the file.
#
# Copyright (c) 1995, Cunningham & Cunningham, Inc.
#
# This program has been generated by the HyperPerl
# generator. The source hypertext can be found
# at http://c2.com/cgi/wikibase. This program belongs
# to Cunningham & Cunningham, Inc., is to be used
# only by agreement with the owner, and then only
# with the understanding that the owner cannot be
# responsible for any behaviour of the program or
# any damages that it may cause.
# -------------------------------------------------------- InitialComments
# InitialComments
print "Content-type: text/htmlnn";
$DBM = "/usr/ward/$ScriptName";
dbmopen(%db, $DBM , 0666) || &AbortScript("can't open $DBM");
$CookedInput{browse} && &HandleBrowse;
$CookedInput{edit} && &HandleEdit;
$CookedInput{copy} && &HandleEdit;
$CookedInput{links} && &HandleLinks;
$CookedInput{search} && &HandleSearch;
dbmclose (%db);
if ($ENV{REQUEST_METHOD} eq POST) {
$CookedInput{post} && &HandlePost;
}
# &DumpBinding(*CookedInput);
# &DumpBinding(*old);
# &DumpBinding(*ENV);
# -------------------------------------------------------- WikiInHyperPerl
Worse Is Better, for Better or for Worse
There have always been fairly severe
size constraints on the Unix operating
system and its software. Given the
partially antagonistic desires for
reasonable efficiency and expressive
power, the size constraint has
encouraged not only economy but a
certain elegance of design.
Dennis Ritchie and Ken Thompson
"The UNIX Time-Sharing System", CACM
I always have it in the back of my head that
I want to make a slightly better C.
But getting everything to fit, top to bottom,
syntax, semantics, tooling, etc., might not
be possible or even worth the effort.
As it stands today, C is unreasonably
effective, and I don't see that changing any
time soon.
Damien Katz
http://damienkatz.net/2013/01/the_unreasonable_effectiveness_of_c.html
There are only two kinds of
languages: the ones people
complain about and the ones
nobody uses.
Bjarne Stroustrup
Savings in
time feel like
simplicity
Interface
Implementation
Implementation
Interface
Implementation
Interface
Aesthetics does not affect perceived
usability, but degraded usability
negatively affects perceived
aesthetics. In other words, usability
is more important than beauty.
"Is Beautiful Usable, or Is It the Other Way Around?"
http://www.infoq.com/news/2012/05/Aesthetics-Usability
Worse Is Better, for Better or for Worse
Worse Is Better, for Better or for Worse
Worse Is Better, for Better or for Worse
OOP to me means only messaging,
local retention and protection and
hiding of state-process, and extreme
late-binding of all things.
It can be done in Smalltalk and in
LISP. There are possibly other systems
in which this is possible, but I'm not
aware of them.
Alan Kay
One of the most pure object-
oriented programming models
yet defined is the Component
Object Model (COM).
It enforces all of these
principles rigorously.
William Cook
"On Understanding Data Abstraction, Revisited"
Architecture is the decisions that
you wish you could get right early
in a project, but that you are not
necessarily more likely to get them
right than any other.
Ralph Johnson
Analysis Design Code Test
Analysis Design Code Test
Analysis Design Code Test
Design Design Design Design
Design
Um. What's the name of the word for
things not being the same always. You
know, I'm sure there is one. Isn't there?
There's must be a word for it... the thing
that lets you know time is happening. Is
there a word?
Change.
Oh. I was afraid of that.
Neil Gaiman
The Sandman
The "defined" process control model
requires that every piece of work be
completely understood. Given a well-
defined set of inputs, the same
outputs are generated every time.
Ken Schwaber
Agile Software Development with Scrum
The empirical process control model,
on the other hand, expects the
unexpected. It provides and exercises
control through frequent inspection
and adaptation for processes that are
imperfectly defined and generate
unpredictable and unrepeatable
results.
Ken Schwaber
Agile Software Development with Scrum
Worse Is Better, for Better or for Worse
Properly gaining control
of the design process
tends to feel like one is
losing control of the
design process.
The classic essay on
"worse is better" is
either misunderstood
or wrong.
Jim Waldo
Decide for yourselves.
Richard P Gabriel

More Related Content

Similar to Worse Is Better, for Better or for Worse

Worse Is Better, for Better or for Worse
Worse Is Better, for Better or for WorseWorse Is Better, for Better or for Worse
Worse Is Better, for Better or for Worse
Kevlin Henney
 
Worse Is Better, for Better or for Worse
Worse Is Better, for Better or for WorseWorse Is Better, for Better or for Worse
Worse Is Better, for Better or for Worse
Kevlin Henney
 
Old Is the New New
Old Is the New NewOld Is the New New
Old Is the New New
Kevlin Henney
 
Worse is better, for better or for worse - Kevlin Henney
Worse is better, for better or for worse - Kevlin HenneyWorse is better, for better or for worse - Kevlin Henney
Worse is better, for better or for worse - Kevlin Henney
JAX London
 
The Architecture of Uncertainty
The Architecture of UncertaintyThe Architecture of Uncertainty
The Architecture of Uncertainty
Kevlin Henney
 
DeKnowledge - Try us
DeKnowledge - Try usDeKnowledge - Try us
DeKnowledge - Try us
Bob Pinto
 
Worse Is Better, for Better or for Worse
Worse Is Better, for Better or for WorseWorse Is Better, for Better or for Worse
Worse Is Better, for Better or for Worse
Kevlin Henney
 
ADC-BSC EAST 2013 Keynote: Worse Is Better—For Better or for Worse
ADC-BSC EAST 2013 Keynote: Worse Is Better—For Better or for WorseADC-BSC EAST 2013 Keynote: Worse Is Better—For Better or for Worse
ADC-BSC EAST 2013 Keynote: Worse Is Better—For Better or for Worse
TechWell
 
The "Evils" of Optimization
The "Evils" of OptimizationThe "Evils" of Optimization
The "Evils" of Optimization
BlackRabbitCoder
 
Cinci ug-january2011-anti-patterns
Cinci ug-january2011-anti-patternsCinci ug-january2011-anti-patterns
Cinci ug-january2011-anti-patterns
Steven Smith
 
TxJS 2011
TxJS 2011TxJS 2011
TxJS 2011
Brian LeRoux
 
The Architecture of Uncertainty
The Architecture of UncertaintyThe Architecture of Uncertainty
The Architecture of Uncertainty
Kevlin Henney
 
The Taming Of The Code
The Taming Of The CodeThe Taming Of The Code
The Taming Of The Code
Alan Stevens
 
WordCamp Nashville: Clean Code for WordPress
WordCamp Nashville: Clean Code for WordPressWordCamp Nashville: Clean Code for WordPress
WordCamp Nashville: Clean Code for WordPress
mtoppa
 
Neal Ford Emergent Design And Evolutionary Architecture
Neal Ford Emergent Design And Evolutionary ArchitectureNeal Ford Emergent Design And Evolutionary Architecture
Neal Ford Emergent Design And Evolutionary Architecture
ThoughtWorks Studios
 
Neal Ford Emergent Design And Evolutionary Architecture
Neal Ford Emergent Design And Evolutionary ArchitectureNeal Ford Emergent Design And Evolutionary Architecture
Neal Ford Emergent Design And Evolutionary Architecture
Thoughtworks
 
Software Development Essential Skills
Software Development Essential SkillsSoftware Development Essential Skills
Software Development Essential Skills
John Choi
 
The limits of unit testing by Craig Stuntz
The limits of unit testing by Craig StuntzThe limits of unit testing by Craig Stuntz
The limits of unit testing by Craig Stuntz
QA or the Highway
 
The Limits of Unit Testing by Craig Stuntz
The Limits of Unit Testing by Craig StuntzThe Limits of Unit Testing by Craig Stuntz
The Limits of Unit Testing by Craig Stuntz
QA or the Highway
 
Put to the Test
Put to the TestPut to the Test
Put to the Test
Kevlin Henney
 

Similar to Worse Is Better, for Better or for Worse (20)

Worse Is Better, for Better or for Worse
Worse Is Better, for Better or for WorseWorse Is Better, for Better or for Worse
Worse Is Better, for Better or for Worse
 
Worse Is Better, for Better or for Worse
Worse Is Better, for Better or for WorseWorse Is Better, for Better or for Worse
Worse Is Better, for Better or for Worse
 
Old Is the New New
Old Is the New NewOld Is the New New
Old Is the New New
 
Worse is better, for better or for worse - Kevlin Henney
Worse is better, for better or for worse - Kevlin HenneyWorse is better, for better or for worse - Kevlin Henney
Worse is better, for better or for worse - Kevlin Henney
 
The Architecture of Uncertainty
The Architecture of UncertaintyThe Architecture of Uncertainty
The Architecture of Uncertainty
 
DeKnowledge - Try us
DeKnowledge - Try usDeKnowledge - Try us
DeKnowledge - Try us
 
Worse Is Better, for Better or for Worse
Worse Is Better, for Better or for WorseWorse Is Better, for Better or for Worse
Worse Is Better, for Better or for Worse
 
ADC-BSC EAST 2013 Keynote: Worse Is Better—For Better or for Worse
ADC-BSC EAST 2013 Keynote: Worse Is Better—For Better or for WorseADC-BSC EAST 2013 Keynote: Worse Is Better—For Better or for Worse
ADC-BSC EAST 2013 Keynote: Worse Is Better—For Better or for Worse
 
The "Evils" of Optimization
The "Evils" of OptimizationThe "Evils" of Optimization
The "Evils" of Optimization
 
Cinci ug-january2011-anti-patterns
Cinci ug-january2011-anti-patternsCinci ug-january2011-anti-patterns
Cinci ug-january2011-anti-patterns
 
TxJS 2011
TxJS 2011TxJS 2011
TxJS 2011
 
The Architecture of Uncertainty
The Architecture of UncertaintyThe Architecture of Uncertainty
The Architecture of Uncertainty
 
The Taming Of The Code
The Taming Of The CodeThe Taming Of The Code
The Taming Of The Code
 
WordCamp Nashville: Clean Code for WordPress
WordCamp Nashville: Clean Code for WordPressWordCamp Nashville: Clean Code for WordPress
WordCamp Nashville: Clean Code for WordPress
 
Neal Ford Emergent Design And Evolutionary Architecture
Neal Ford Emergent Design And Evolutionary ArchitectureNeal Ford Emergent Design And Evolutionary Architecture
Neal Ford Emergent Design And Evolutionary Architecture
 
Neal Ford Emergent Design And Evolutionary Architecture
Neal Ford Emergent Design And Evolutionary ArchitectureNeal Ford Emergent Design And Evolutionary Architecture
Neal Ford Emergent Design And Evolutionary Architecture
 
Software Development Essential Skills
Software Development Essential SkillsSoftware Development Essential Skills
Software Development Essential Skills
 
The limits of unit testing by Craig Stuntz
The limits of unit testing by Craig StuntzThe limits of unit testing by Craig Stuntz
The limits of unit testing by Craig Stuntz
 
The Limits of Unit Testing by Craig Stuntz
The Limits of Unit Testing by Craig StuntzThe Limits of Unit Testing by Craig Stuntz
The Limits of Unit Testing by Craig Stuntz
 
Put to the Test
Put to the TestPut to the Test
Put to the Test
 

More from Kevlin Henney

Program with GUTs
Program with GUTsProgram with GUTs
Program with GUTs
Kevlin Henney
 
The Case for Technical Excellence
The Case for Technical ExcellenceThe Case for Technical Excellence
The Case for Technical Excellence
Kevlin Henney
 
Empirical Development
Empirical DevelopmentEmpirical Development
Empirical Development
Kevlin Henney
 
Lambda? You Keep Using that Letter
Lambda? You Keep Using that LetterLambda? You Keep Using that Letter
Lambda? You Keep Using that Letter
Kevlin Henney
 
Lambda? You Keep Using that Letter
Lambda? You Keep Using that LetterLambda? You Keep Using that Letter
Lambda? You Keep Using that Letter
Kevlin Henney
 
Solid Deconstruction
Solid DeconstructionSolid Deconstruction
Solid Deconstruction
Kevlin Henney
 
Get Kata
Get KataGet Kata
Get Kata
Kevlin Henney
 
Procedural Programming: It’s Back? It Never Went Away
Procedural Programming: It’s Back? It Never Went AwayProcedural Programming: It’s Back? It Never Went Away
Procedural Programming: It’s Back? It Never Went Away
Kevlin Henney
 
Structure and Interpretation of Test Cases
Structure and Interpretation of Test CasesStructure and Interpretation of Test Cases
Structure and Interpretation of Test Cases
Kevlin Henney
 
Agility ≠ Speed
Agility ≠ SpeedAgility ≠ Speed
Agility ≠ Speed
Kevlin Henney
 
Refactoring to Immutability
Refactoring to ImmutabilityRefactoring to Immutability
Refactoring to Immutability
Kevlin Henney
 
Turning Development Outside-In
Turning Development Outside-InTurning Development Outside-In
Turning Development Outside-In
Kevlin Henney
 
Giving Code a Good Name
Giving Code a Good NameGiving Code a Good Name
Giving Code a Good Name
Kevlin Henney
 
Clean Coders Hate What Happens To Your Code When You Use These Enterprise Pro...
Clean Coders Hate What Happens To Your Code When You Use These Enterprise Pro...Clean Coders Hate What Happens To Your Code When You Use These Enterprise Pro...
Clean Coders Hate What Happens To Your Code When You Use These Enterprise Pro...
Kevlin Henney
 
Thinking Outside the Synchronisation Quadrant
Thinking Outside the Synchronisation QuadrantThinking Outside the Synchronisation Quadrant
Thinking Outside the Synchronisation Quadrant
Kevlin Henney
 
Code as Risk
Code as RiskCode as Risk
Code as Risk
Kevlin Henney
 
Software Is Details
Software Is DetailsSoftware Is Details
Software Is Details
Kevlin Henney
 
Game of Sprints
Game of SprintsGame of Sprints
Game of Sprints
Kevlin Henney
 
Good Code
Good CodeGood Code
Good Code
Kevlin Henney
 
The Error of Our Ways
The Error of Our WaysThe Error of Our Ways
The Error of Our Ways
Kevlin Henney
 

More from Kevlin Henney (20)

Program with GUTs
Program with GUTsProgram with GUTs
Program with GUTs
 
The Case for Technical Excellence
The Case for Technical ExcellenceThe Case for Technical Excellence
The Case for Technical Excellence
 
Empirical Development
Empirical DevelopmentEmpirical Development
Empirical Development
 
Lambda? You Keep Using that Letter
Lambda? You Keep Using that LetterLambda? You Keep Using that Letter
Lambda? You Keep Using that Letter
 
Lambda? You Keep Using that Letter
Lambda? You Keep Using that LetterLambda? You Keep Using that Letter
Lambda? You Keep Using that Letter
 
Solid Deconstruction
Solid DeconstructionSolid Deconstruction
Solid Deconstruction
 
Get Kata
Get KataGet Kata
Get Kata
 
Procedural Programming: It’s Back? It Never Went Away
Procedural Programming: It’s Back? It Never Went AwayProcedural Programming: It’s Back? It Never Went Away
Procedural Programming: It’s Back? It Never Went Away
 
Structure and Interpretation of Test Cases
Structure and Interpretation of Test CasesStructure and Interpretation of Test Cases
Structure and Interpretation of Test Cases
 
Agility ≠ Speed
Agility ≠ SpeedAgility ≠ Speed
Agility ≠ Speed
 
Refactoring to Immutability
Refactoring to ImmutabilityRefactoring to Immutability
Refactoring to Immutability
 
Turning Development Outside-In
Turning Development Outside-InTurning Development Outside-In
Turning Development Outside-In
 
Giving Code a Good Name
Giving Code a Good NameGiving Code a Good Name
Giving Code a Good Name
 
Clean Coders Hate What Happens To Your Code When You Use These Enterprise Pro...
Clean Coders Hate What Happens To Your Code When You Use These Enterprise Pro...Clean Coders Hate What Happens To Your Code When You Use These Enterprise Pro...
Clean Coders Hate What Happens To Your Code When You Use These Enterprise Pro...
 
Thinking Outside the Synchronisation Quadrant
Thinking Outside the Synchronisation QuadrantThinking Outside the Synchronisation Quadrant
Thinking Outside the Synchronisation Quadrant
 
Code as Risk
Code as RiskCode as Risk
Code as Risk
 
Software Is Details
Software Is DetailsSoftware Is Details
Software Is Details
 
Game of Sprints
Game of SprintsGame of Sprints
Game of Sprints
 
Good Code
Good CodeGood Code
Good Code
 
The Error of Our Ways
The Error of Our WaysThe Error of Our Ways
The Error of Our Ways
 

Recently uploaded

Artificial intelligence in customer services or chatbots
Artificial intelligence  in customer services or chatbotsArtificial intelligence  in customer services or chatbots
Artificial intelligence in customer services or chatbots
kayash1656
 
VVIP Girls Call Mumbai 9910780858 Provide Best And Top Girl Service And No1 i...
VVIP Girls Call Mumbai 9910780858 Provide Best And Top Girl Service And No1 i...VVIP Girls Call Mumbai 9910780858 Provide Best And Top Girl Service And No1 i...
VVIP Girls Call Mumbai 9910780858 Provide Best And Top Girl Service And No1 i...
jealousviolet
 
GT degree offer diploma Transcript
GT degree offer diploma TranscriptGT degree offer diploma Transcript
GT degree offer diploma Transcript
attueb
 
Unleashing the Future: Building a Scalable and Up-to-Date GenAI Chatbot with ...
Unleashing the Future: Building a Scalable and Up-to-Date GenAI Chatbot with ...Unleashing the Future: Building a Scalable and Up-to-Date GenAI Chatbot with ...
Unleashing the Future: Building a Scalable and Up-to-Date GenAI Chatbot with ...
confluent
 
Verified Girls Call Mumbai 👀 9820252231 👀 Cash Payment With Room DeliveryDeli...
Verified Girls Call Mumbai 👀 9820252231 👀 Cash Payment With Room DeliveryDeli...Verified Girls Call Mumbai 👀 9820252231 👀 Cash Payment With Room DeliveryDeli...
Verified Girls Call Mumbai 👀 9820252231 👀 Cash Payment With Room DeliveryDeli...
87tomato
 
Girls Call Mysore 000XX00000 Provide Best And Top Girl Service And No1 in City
Girls Call Mysore 000XX00000 Provide Best And Top Girl Service And No1 in CityGirls Call Mysore 000XX00000 Provide Best And Top Girl Service And No1 in City
Girls Call Mysore 000XX00000 Provide Best And Top Girl Service And No1 in City
neshakor5152
 
Mumbai Girls Call Mumbai 🎈🔥9930687706 🔥💋🎈 Provide Best And Top Girl Service A...
Mumbai Girls Call Mumbai 🎈🔥9930687706 🔥💋🎈 Provide Best And Top Girl Service A...Mumbai Girls Call Mumbai 🎈🔥9930687706 🔥💋🎈 Provide Best And Top Girl Service A...
Mumbai Girls Call Mumbai 🎈🔥9930687706 🔥💋🎈 Provide Best And Top Girl Service A...
3610stuck
 
High Girls Call Chennai 000XX00000 Provide Best And Top Girl Service And No1 ...
High Girls Call Chennai 000XX00000 Provide Best And Top Girl Service And No1 ...High Girls Call Chennai 000XX00000 Provide Best And Top Girl Service And No1 ...
High Girls Call Chennai 000XX00000 Provide Best And Top Girl Service And No1 ...
singhlata50dh
 
Celebrity Girls Call Mumbai 9930687706 Unlimited Short Providing Girls Servic...
Celebrity Girls Call Mumbai 9930687706 Unlimited Short Providing Girls Servic...Celebrity Girls Call Mumbai 9930687706 Unlimited Short Providing Girls Servic...
Celebrity Girls Call Mumbai 9930687706 Unlimited Short Providing Girls Servic...
kiara pandey
 
Il Data Streaming per un’AI real-time di nuova generazione
Il Data Streaming per un’AI real-time di nuova generazioneIl Data Streaming per un’AI real-time di nuova generazione
Il Data Streaming per un’AI real-time di nuova generazione
confluent
 
Vip Girls Call ServiCe Hyderabad 0000000000 Pooja Best High Class Hyderabad A...
Vip Girls Call ServiCe Hyderabad 0000000000 Pooja Best High Class Hyderabad A...Vip Girls Call ServiCe Hyderabad 0000000000 Pooja Best High Class Hyderabad A...
Vip Girls Call ServiCe Hyderabad 0000000000 Pooja Best High Class Hyderabad A...
ashiklo9823
 
NYGGS 360: A Complete ERP for Construction Innovation
NYGGS 360: A Complete ERP for Construction InnovationNYGGS 360: A Complete ERP for Construction Innovation
NYGGS 360: A Complete ERP for Construction Innovation
NYGGS Construction ERP Software
 
Agra Girls Call Agra 0X0000000X Unlimited Short Providing Girls Service Avail...
Agra Girls Call Agra 0X0000000X Unlimited Short Providing Girls Service Avail...Agra Girls Call Agra 0X0000000X Unlimited Short Providing Girls Service Avail...
Agra Girls Call Agra 0X0000000X Unlimited Short Providing Girls Service Avail...
rachitkumar09887
 
Amadeus Travel API, Amadeus Booking API, Amadeus GDS
Amadeus Travel API, Amadeus Booking API, Amadeus GDSAmadeus Travel API, Amadeus Booking API, Amadeus GDS
Amadeus Travel API, Amadeus Booking API, Amadeus GDS
aadhiyaeliza
 
Prada Group Reports Strong Growth in First Quarter …
Prada Group Reports Strong Growth in First Quarter …Prada Group Reports Strong Growth in First Quarter …
Prada Group Reports Strong Growth in First Quarter …
908dutch
 
Independent Girls call Service Pune 000XX00000 Provide Best And Top Girl Serv...
Independent Girls call Service Pune 000XX00000 Provide Best And Top Girl Serv...Independent Girls call Service Pune 000XX00000 Provide Best And Top Girl Serv...
Independent Girls call Service Pune 000XX00000 Provide Best And Top Girl Serv...
bhumivarma35300
 
Private Girls Call Navi Mumbai 🛵🚡9820252231 💃 Choose Best And Top Girl Servic...
Private Girls Call Navi Mumbai 🛵🚡9820252231 💃 Choose Best And Top Girl Servic...Private Girls Call Navi Mumbai 🛵🚡9820252231 💃 Choose Best And Top Girl Servic...
Private Girls Call Navi Mumbai 🛵🚡9820252231 💃 Choose Best And Top Girl Servic...
902basic
 
Wired_2.0_Create_AmsterdamJUG_09072024.pptx
Wired_2.0_Create_AmsterdamJUG_09072024.pptxWired_2.0_Create_AmsterdamJUG_09072024.pptx
Wired_2.0_Create_AmsterdamJUG_09072024.pptx
SimonedeGijt
 
Tour and travel website management in odoo,
Tour and travel website management in odoo,Tour and travel website management in odoo,
Tour and travel website management in odoo,
Axis Technolabs
 
Girls Call Jogeshwari 9967584737 Provide Best And Top Girl Service And No1 in...
Girls Call Jogeshwari 9967584737 Provide Best And Top Girl Service And No1 in...Girls Call Jogeshwari 9967584737 Provide Best And Top Girl Service And No1 in...
Girls Call Jogeshwari 9967584737 Provide Best And Top Girl Service And No1 in...
simran hot girls
 

Recently uploaded (20)

Artificial intelligence in customer services or chatbots
Artificial intelligence  in customer services or chatbotsArtificial intelligence  in customer services or chatbots
Artificial intelligence in customer services or chatbots
 
VVIP Girls Call Mumbai 9910780858 Provide Best And Top Girl Service And No1 i...
VVIP Girls Call Mumbai 9910780858 Provide Best And Top Girl Service And No1 i...VVIP Girls Call Mumbai 9910780858 Provide Best And Top Girl Service And No1 i...
VVIP Girls Call Mumbai 9910780858 Provide Best And Top Girl Service And No1 i...
 
GT degree offer diploma Transcript
GT degree offer diploma TranscriptGT degree offer diploma Transcript
GT degree offer diploma Transcript
 
Unleashing the Future: Building a Scalable and Up-to-Date GenAI Chatbot with ...
Unleashing the Future: Building a Scalable and Up-to-Date GenAI Chatbot with ...Unleashing the Future: Building a Scalable and Up-to-Date GenAI Chatbot with ...
Unleashing the Future: Building a Scalable and Up-to-Date GenAI Chatbot with ...
 
Verified Girls Call Mumbai 👀 9820252231 👀 Cash Payment With Room DeliveryDeli...
Verified Girls Call Mumbai 👀 9820252231 👀 Cash Payment With Room DeliveryDeli...Verified Girls Call Mumbai 👀 9820252231 👀 Cash Payment With Room DeliveryDeli...
Verified Girls Call Mumbai 👀 9820252231 👀 Cash Payment With Room DeliveryDeli...
 
Girls Call Mysore 000XX00000 Provide Best And Top Girl Service And No1 in City
Girls Call Mysore 000XX00000 Provide Best And Top Girl Service And No1 in CityGirls Call Mysore 000XX00000 Provide Best And Top Girl Service And No1 in City
Girls Call Mysore 000XX00000 Provide Best And Top Girl Service And No1 in City
 
Mumbai Girls Call Mumbai 🎈🔥9930687706 🔥💋🎈 Provide Best And Top Girl Service A...
Mumbai Girls Call Mumbai 🎈🔥9930687706 🔥💋🎈 Provide Best And Top Girl Service A...Mumbai Girls Call Mumbai 🎈🔥9930687706 🔥💋🎈 Provide Best And Top Girl Service A...
Mumbai Girls Call Mumbai 🎈🔥9930687706 🔥💋🎈 Provide Best And Top Girl Service A...
 
High Girls Call Chennai 000XX00000 Provide Best And Top Girl Service And No1 ...
High Girls Call Chennai 000XX00000 Provide Best And Top Girl Service And No1 ...High Girls Call Chennai 000XX00000 Provide Best And Top Girl Service And No1 ...
High Girls Call Chennai 000XX00000 Provide Best And Top Girl Service And No1 ...
 
Celebrity Girls Call Mumbai 9930687706 Unlimited Short Providing Girls Servic...
Celebrity Girls Call Mumbai 9930687706 Unlimited Short Providing Girls Servic...Celebrity Girls Call Mumbai 9930687706 Unlimited Short Providing Girls Servic...
Celebrity Girls Call Mumbai 9930687706 Unlimited Short Providing Girls Servic...
 
Il Data Streaming per un’AI real-time di nuova generazione
Il Data Streaming per un’AI real-time di nuova generazioneIl Data Streaming per un’AI real-time di nuova generazione
Il Data Streaming per un’AI real-time di nuova generazione
 
Vip Girls Call ServiCe Hyderabad 0000000000 Pooja Best High Class Hyderabad A...
Vip Girls Call ServiCe Hyderabad 0000000000 Pooja Best High Class Hyderabad A...Vip Girls Call ServiCe Hyderabad 0000000000 Pooja Best High Class Hyderabad A...
Vip Girls Call ServiCe Hyderabad 0000000000 Pooja Best High Class Hyderabad A...
 
NYGGS 360: A Complete ERP for Construction Innovation
NYGGS 360: A Complete ERP for Construction InnovationNYGGS 360: A Complete ERP for Construction Innovation
NYGGS 360: A Complete ERP for Construction Innovation
 
Agra Girls Call Agra 0X0000000X Unlimited Short Providing Girls Service Avail...
Agra Girls Call Agra 0X0000000X Unlimited Short Providing Girls Service Avail...Agra Girls Call Agra 0X0000000X Unlimited Short Providing Girls Service Avail...
Agra Girls Call Agra 0X0000000X Unlimited Short Providing Girls Service Avail...
 
Amadeus Travel API, Amadeus Booking API, Amadeus GDS
Amadeus Travel API, Amadeus Booking API, Amadeus GDSAmadeus Travel API, Amadeus Booking API, Amadeus GDS
Amadeus Travel API, Amadeus Booking API, Amadeus GDS
 
Prada Group Reports Strong Growth in First Quarter …
Prada Group Reports Strong Growth in First Quarter …Prada Group Reports Strong Growth in First Quarter …
Prada Group Reports Strong Growth in First Quarter …
 
Independent Girls call Service Pune 000XX00000 Provide Best And Top Girl Serv...
Independent Girls call Service Pune 000XX00000 Provide Best And Top Girl Serv...Independent Girls call Service Pune 000XX00000 Provide Best And Top Girl Serv...
Independent Girls call Service Pune 000XX00000 Provide Best And Top Girl Serv...
 
Private Girls Call Navi Mumbai 🛵🚡9820252231 💃 Choose Best And Top Girl Servic...
Private Girls Call Navi Mumbai 🛵🚡9820252231 💃 Choose Best And Top Girl Servic...Private Girls Call Navi Mumbai 🛵🚡9820252231 💃 Choose Best And Top Girl Servic...
Private Girls Call Navi Mumbai 🛵🚡9820252231 💃 Choose Best And Top Girl Servic...
 
Wired_2.0_Create_AmsterdamJUG_09072024.pptx
Wired_2.0_Create_AmsterdamJUG_09072024.pptxWired_2.0_Create_AmsterdamJUG_09072024.pptx
Wired_2.0_Create_AmsterdamJUG_09072024.pptx
 
Tour and travel website management in odoo,
Tour and travel website management in odoo,Tour and travel website management in odoo,
Tour and travel website management in odoo,
 
Girls Call Jogeshwari 9967584737 Provide Best And Top Girl Service And No1 in...
Girls Call Jogeshwari 9967584737 Provide Best And Top Girl Service And No1 in...Girls Call Jogeshwari 9967584737 Provide Best And Top Girl Service And No1 in...
Girls Call Jogeshwari 9967584737 Provide Best And Top Girl Service And No1 in...
 

Worse Is Better, for Better or for Worse

  • 1. Worse Is Better, for Better or for Worse @KevlinHenney
  • 4. There are a thousand thoughts lying within a man that he does not know till he takes up the pen to write. William Thackeray
  • 5. Stop Overpromising and Overshooting We want to do everything all at once. Grand plans! Sweeping gestures! Epic 23-book fantasy cycles! Don’t overreach. Concentrate on what you can complete. Temper risk with reality. Chuck Wendig http://terribleminds.com/ramble/2012/01/03/25-things-writers-should-stop-doing/
  • 6. You have to finish things — that's what you learn from, you learn by finishing things. Neil Gaiman
  • 8. In 1990 I proposed a theory, called Worse Is Better, of why software would be more likely to succeed if it was developed with minimal invention.
  • 9. It is far better to have an underfeatured product that is rock solid, fast, and small than one that covers what an expert would consider the complete requirements.
  • 10. The "good enough software" concept popularized by Yourdon. In many senses, it's just a rationalization of what's happening in the software world: the first company hitting the market with a feature-rich product is more likely to win the battle than the careful, quality-seeking company. Carlo Pescio http://www.eptacom.net/pubblicazioni/pub_eng/wirth.html
  • 11. "Good enough software" is rarely good enough. Niklaus Wirth http://www.eptacom.net/pubblicazioni/pub_eng/wirth.html
  • 12. The following is a characterization of the contrasting [the right thing] design philosophy:  Simplicity: The design is simple [...]. Simplicity of implementation is irrelevant.  Completeness: The design covers as many important situations as possible. All reasonably expected cases must be covered.  Correctness: The design is correct in all observable aspects.  Consistency: The design is thoroughly consistent. A design is allowed to be slightly less simple and less complete in order to avoid inconsistency. Consistency is as important as correctness.
  • 13. Here are the characteristics of a worse-is-better software design:  Simplicity: The design is simple in implementation. The interface should be simple, but anything adequate will do.  Completeness: The design covers only necessary situations. Completeness can be sacrificed in favor of any other quality.  Correctness: The design is correct in all observable aspects.  Consistency: The design is consistent as far as it goes. Consistency is less of a problem because you always choose the smallest scope for the first implementation.
  • 14. Implementation characteristics are foremost:  The implementation should be fast.  It should be small.  It should interoperate with the programs and tools that the expected users are already using.  It should be bug-free, and if that requires implementing fewer features, do it.  It should use parsimonious abstractions as long as they don’t get in the way.
  • 16. The more specific a design idea is, the greater its appeal is likely to be.
  • 17. #!/usr/bin/perl # -------------------------------------------------------- PerlInterpreter # PerlInterpreter must be the first line of the file. # # Copyright (c) 1995, Cunningham & Cunningham, Inc. # # This program has been generated by the HyperPerl # generator. The source hypertext can be found # at http://c2.com/cgi/wikibase. This program belongs # to Cunningham & Cunningham, Inc., is to be used # only by agreement with the owner, and then only # with the understanding that the owner cannot be # responsible for any behaviour of the program or # any damages that it may cause. # -------------------------------------------------------- InitialComments # InitialComments print "Content-type: text/htmlnn"; $DBM = "/usr/ward/$ScriptName"; dbmopen(%db, $DBM , 0666) || &AbortScript("can't open $DBM"); $CookedInput{browse} && &HandleBrowse; $CookedInput{edit} && &HandleEdit; $CookedInput{copy} && &HandleEdit; $CookedInput{links} && &HandleLinks; $CookedInput{search} && &HandleSearch; dbmclose (%db); if ($ENV{REQUEST_METHOD} eq POST) { $CookedInput{post} && &HandlePost; } # &DumpBinding(*CookedInput); # &DumpBinding(*old); # &DumpBinding(*ENV); # -------------------------------------------------------- WikiInHyperPerl
  • 19. There have always been fairly severe size constraints on the Unix operating system and its software. Given the partially antagonistic desires for reasonable efficiency and expressive power, the size constraint has encouraged not only economy but a certain elegance of design. Dennis Ritchie and Ken Thompson "The UNIX Time-Sharing System", CACM
  • 20. I always have it in the back of my head that I want to make a slightly better C. But getting everything to fit, top to bottom, syntax, semantics, tooling, etc., might not be possible or even worth the effort. As it stands today, C is unreasonably effective, and I don't see that changing any time soon. Damien Katz http://damienkatz.net/2013/01/the_unreasonable_effectiveness_of_c.html
  • 21. There are only two kinds of languages: the ones people complain about and the ones nobody uses. Bjarne Stroustrup
  • 22. Savings in time feel like simplicity
  • 26. Aesthetics does not affect perceived usability, but degraded usability negatively affects perceived aesthetics. In other words, usability is more important than beauty. "Is Beautiful Usable, or Is It the Other Way Around?" http://www.infoq.com/news/2012/05/Aesthetics-Usability
  • 30. OOP to me means only messaging, local retention and protection and hiding of state-process, and extreme late-binding of all things. It can be done in Smalltalk and in LISP. There are possibly other systems in which this is possible, but I'm not aware of them. Alan Kay
  • 31. One of the most pure object- oriented programming models yet defined is the Component Object Model (COM). It enforces all of these principles rigorously. William Cook "On Understanding Data Abstraction, Revisited"
  • 32. Architecture is the decisions that you wish you could get right early in a project, but that you are not necessarily more likely to get them right than any other. Ralph Johnson
  • 38. Um. What's the name of the word for things not being the same always. You know, I'm sure there is one. Isn't there? There's must be a word for it... the thing that lets you know time is happening. Is there a word? Change. Oh. I was afraid of that. Neil Gaiman The Sandman
  • 39. The "defined" process control model requires that every piece of work be completely understood. Given a well- defined set of inputs, the same outputs are generated every time. Ken Schwaber Agile Software Development with Scrum
  • 40. The empirical process control model, on the other hand, expects the unexpected. It provides and exercises control through frequent inspection and adaptation for processes that are imperfectly defined and generate unpredictable and unrepeatable results. Ken Schwaber Agile Software Development with Scrum
  • 42. Properly gaining control of the design process tends to feel like one is losing control of the design process.
  • 43. The classic essay on "worse is better" is either misunderstood or wrong. Jim Waldo