| The Simplest Thing that Could Possibly Work
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25 Sep 04 |
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(Source Ward Cunningham, Bill Venners) Ward Cunningham talks with Bill
Venners about complexity that empowers versus complexity that creates
difficulty, simplicity as the shortest path to a solution, and coding the
simplest thing when you’re stuck.
In the software community, Ward Cunningham has a reputation for being a
font of ideas. He invented CRC Cards, a technique that facilitates object
discovery. He invented the worlds first wiki, a web-based collaborative
writing tool, to facilitate the discovery and documentation of software
patterns. Most recently, Cunningham is credited with being the primary
inspiration behind many of the techniques of Extreme Programming. link
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| Case stories
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25 Sep 04 |
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Been skimming the XP-ML this morning.
About the $200M Oracle-Ford Desaster: the management did not give them
enough power to go fully agile
Chet Hendrickson:
It was a very frustrating situation. The team asked Don and me
to help with preventing the Oracle consutants from making changes
directly to the production system. This was about $150 million into the project.
We tried to sell them on a more agile approach (as you might imagine), but by
this time they were pretty far gone.
It was unfortunante that we were not operating at a level in the organization
that would have allowed us to get the plug pulled sooner.
chet
Georg Tuparev has a nice case story, too: speak out if you are put on a
death march.
Few years ago I was called to lead a huge team stuck in one and half
year design phase. The team was supposed to build a control software
for a network of telecom satellites. Cannot disclosed names and
resources, but one could imagine ...
Three days in the project I had a phone conference with the CxO's of
both companies involved. Told them that the way it is going no
satellite will ever fly and that I know a better way. After getting
green line, the design document was burned with a small celebration at
a BBQ, and 85% of the initial team members were sent to an indefinitely
long vacation. With the rest (15%) of the team we had the first
functioning version 2 months ahead of the schedule and 50% lower then
expected expenses.
So the lessons:
- it is never late to change direction of a project in order to save it.
- I do not agree with Kent that this is a sad story. If you are a good
programmer put on a death march project you should speak out! If no one
listens - walk away. There is just one very precious life in front of
us - do not waste it! And if these folks wasted 2 years of their lives,
well, it is their business ... but they should not expect my
sympathies.
BTW, Philip is right - the project I was telling about had a 9 months x
40 people "Big Requirements Up Front"!!! Then the design started...
Just my 0.02
Georg Tuparev
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| Agile Processes Summarized
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25 Sep 04 |
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(Source: Ron Jeffries and Alistair Cockburn, XP-ML)
I think that to get a group to be agile, you have to get people to do
something like one of these things:
- Go in that room there and do all 12 XP practices until you actually do know
better. (XP)
- Go in that room there, don’t let anyone screw with you, work on
whatever you think you can get done for a month. Keep doing that until
everyone is happy. (Scrum)
- Go in that room there, in peace love and understanding, ship software every
month (*), and think about it. (Crystal Clear.)
There is a telling sameness to all of these, is there not? —> This
is a wonderful summary of a summary! There’s not much to be removed
(see Saint-Exupery, below). In Italian, the expresso of an espresso is
called a "ristretto" (any Italians online?). This is the agile
ristretto. It belongs on a Blog or something. "La perfection est
atteinte non quand il ne reste rien a ajouter, mais quand il ne reste rien
a enlever." (Saint-Exupery)
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| XP success story: Sabre takes extreme measures
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25 Sep 04 |
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(Source: Computerworld) Using extreme programming practices, Sabre Airline
Solutions has reduced bugs and development times for its software products.
Sabre Airline Solutions had many years of experience with its AirFlite
Profit Manager, a big modeling and forecasting package that many airlines
use to wring more income out of flight schedules. Even so, Release 8 of the
software was four months late in 2000 after final system testing turned up
300 bugs. The first customer found 26 more bugs in the first three days of
its acceptance testing, and subsequent joint testing by Sabre and the
customer uncovered an additional 200 defects. www.computerworld.com/softwaretopics/software/story/0,10801,91646,00.html
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| Increasing Software Development Productivity
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25 Sep 04 |
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(Source: Mary Poppendieck) Income growth of workers in any economic sector
is directly related to productivity growth. In the past, the productivity
of the technology sector grew not because technical workers were becoming
more productive, but because technical capability was growing so fast.
Unfortunately for the incomes of software development professionals, this
is no longer the case. Future income growth will be related to our ability
to increase software development productivity.
How can software development productivity be increased? Through the same
approaches used in operations: a focus on customer value, a short,
effective supply chain, healthy discipline, and innovation. Mary will
discuss techniques that businesses have used for decades to jump-start an
increase productivity, and show how they can be used to increase software
development productivity. pdf
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| Ender's Game and Software Development
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25 Sep 04 |
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Very interesting entry by /\ndy Hunt. Ender is in reference to a novel by
Orson Scott Card called ‘Ender’s Game’. Its part of a
series of three books, all of which are well worth reading. www.toolshed.com/blog
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| Knoppix remastering mini-howto
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25 Sep 04 |
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(Source: Daniel Stirnimann) This mini howto shows how you can easily make
on your own customized knoppix build. Apart from that, there are a few
working methods described which make doing changes conveniently. The howto
is intended for people who work occasionaly on their builds.
link
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| How to Construct Bad Charts and Graphs |
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25 Sep 04 |
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(Source: Gary Klass) A short but good article in the style of Edward Tufte, the big guru when it comes to displaying data in a meaningful way.
Fundamental rule of efficient graphical design: minimize the ratio of ink-to-data
The three fundamental elements of bad graphical display are these: Data Ambiguity, Data Distortion, and Data Distraction. link
Make sure you check out these classic bibles about envisioning information by Tufte:
Envisioning Information and The Visual Display of Quantitative Information
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| The Rise of ``Worse is Better''
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25 Sep 04 |
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(Source: Richard Gabriel) Good characteristics:
1) Simplicity-the design must be simple, both in implementation and
interface. It is more important for the interface to be simple than the
implementation.
2) Correctness-the design must be correct in all observable aspects.
Incorrectness is simply not allowed.
3) Consistency-the design must not be inconsistent. A design is allowed to
be slightly less simple and less complete to avoid inconsistency.
Consistency is as important as correctness.
4) Completeness-the design must cover as many important situations as is
practical. All reasonably expected cases must be covered. Simplicity is not
allowed to overly reduce completeness.
www.jwz.org/doc/worse-is-better.html
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| [ANN] DataVision 0.8.2 released; upgrades to JRuby 0.7.0
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25 Sep 04 |
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DataVision
0.8.2 is now available from SourceForge at sourceforge.net/project/showfiles.php?group_id=33343
DataVision is an Open Source
reporting tool similar to Crystal Reports. Reports can be designed using a
drag-and-drop GUI. They may be run, viewed, and printed from the
application or exported as HTML, XML, PDF, LaTeX2e, DocBook, or tab- or
comma-delimited text files. The output files produced by LaTeX2e and
DocBook can in turn be used to produce PDF, text, HTML, PostScript, and
more.
DataVision
is written in Java and uses JRuby to add Ruby scripting.
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| Communication is the Transfer of Emotion
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25 Sep 04 |
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Seth Godin has put together a nice pdf about how
todo decent powerpoint slides. By the way, his new book "Free
Prize" is out, too.
I always enjoy reading his weblog.
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| RubyX
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25 Sep 04 |
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I just now came across the rubyx website
and noticed the logo. Nice!
Rubyx is a Linux-distribution similar to Gentoo, but all based on one ruby
script :-).
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| The Best and Worst of Statistical Graphics |
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25 Sep 04 |
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This Gallery of Data Visualization displays some examples of the Best and Worst of Statistical Graphics, with the view that the contrast may be useful, inform current practice, and provide some pointers to both historical and current work. We go from what is arguably the best statistical graphic ever drawn, to the current record-holder for the worst. link
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| Visualising wikis
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25 Sep 04 |
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been surfing to get good ideas about visualising knowledge.
The pics shows "history flow" from IBM research. Tons of
other good links can be found in the c2-wiki.
Visualising is really interesting and up for a major change. I am totally
sick of all these boring search-engines out there and yeah, grep -r is
still my best friend. Another reason why I despise MS-Word, he, he and use
LaTeX. It took me years to fall in love with that programming-language,
which happens to be a word-processor, too.
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| POV-Ray - getting 10 years old
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25 Sep 04 |
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"The Lovers" by Gilles Tran (2001). Find more in the Hall of Fame
I still remember my first ray traced spheres on old XTs 15 years ago :-).
There is a competition and the
monthly irtc. See the May-June viewing
page and relax.
Computers are a grate time-killer, especially once you get into 3D images
and animations. Enjoy it!
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| Installing Oracle 10g On Debian
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25 Sep 04 |
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We go through, step-by-step, the process of installing Oracle 10g Release 1
(10.1.0.2) Enterprise/Standard Edition for Linux x86 on a Debian unstable
installation as of 2004-06-04. This chapter was originally written by
Damien McAullay with suggestions from Giuseppe Sacco and Oliver Bankel. link
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| Paris Metro firm to run Wi-Fi buses
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25 Sep 04 |
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(Sourc: register) Wireless
Internet access will soon move beyond railways and onto the roads if RATP,
the company which runs the Paris Metro and the capital’s bus
services, has its way.
The organisation will next week show off a Wi-Fi enabled bus at the
Paris-hosted Public Transport Exhibition 2004. It will also launch a public
trial of the technology, on the number 38 bus, which runs between North and
South Paris. Buses on the route have already been equipped with Wi-Fi, RATP
said. Travellers will be able to connect their (suitably equipped) PDAs and
notebooks with the bus’ on-board access point. However, Internet
connectivity is only provided at Wi-Fi speeds when the vehicle passes
within range of a fixed hotspot - at a major terminus, for example. For the
rest of the journey, connectivity is maintained through a GPRS link. link
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| Introducing agile methods if the customer is obsessed by dead trees
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25 Sep 04 |
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(Source: posting to agile-testing@yahoogroups.com by John Goodsen) I think
a big mistake many of us make trying to introduce Agile development
practices, is we fall into the trap of agreeing that we are not providing
documentation. If your organization wants to see documents along the way,
don’t tell them they can’t have it! Tell them they will have
the most up to date documentation that they have ever seen, because you are
going to generate it directly from the code. Our teams use an XP process.
It doesn’t take much to tie in a tool to auto-gen design specs from
the code and if you are automating customer tests, you can put description
in the headers of tests methods and use a javadoc based generation of a
"requirements specification"… so rather than view your
organization as an enemy that requires an "undergound attack",
listen very carefully to what people are asking for and figure out how
Agile approaches can deliver it. We are not the enemy. We are the
liberator. We have exactly what they want, but we often fail to match up
our Agile solution with what the stakeholder is asking for.
When an organization wants more than the Agile process requires, it is easy
to show the additional cost each iteration, and as the team builds
credibility the customer/stakeholder(s) might be less inclined to want to
spend money each iteration producing documentation.
So have some courage, tell your stakeholders that they can have it
(whatever "it" is) if they want it and then make sure you follow
up with giving them a good picture of the cost and value they get from
"it". It’s their money - let them blow it if they want to.
Let them slow the velocity by asking for non-code related items. All you
can do is make it visible and help them down the path of figuring it out.
The sooner you start delivering some working code, the sooner you’ll
have the credibility to address their real process issues. "It"
will become less important the more iterations you deliver working tested
code.
The hard part is getting code started, right? Maybe you can disguise the
first few iterations as "prototyping" and use TDD as the process
for your prototyping? :-)
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| Is Tableau the Next Google?
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25 Sep 04 |
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example graphs
Will this company be successful and become another Google?
First, graphical data mining has never been a big hit. And second,
there are lots of competitors in the business intelligence sector,
including at least Business Objects, Cognos, Hyperion and MicroStrategy.
So make your bets and wait for the next multibillion-dollar IPO.
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| Executive Dashboard
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25 Sep 04 |
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Thanks to Sven C. Koehler. He pointed out me to Edward Tufte’s
interesting forum.
There are some interesting answeres in the thread, esp. the graphic about
the patient. Isn’t every company a patient? :-)
I'm developing an executive dashboard, and I haven't been satisfied
with the business graphics that are widely available
(e.g. gauges, dials, stoplights). I decided to make a "Zen" version
of a KPI status indicator, using as little color as possible,
and incorporating E.T's innovative "Spark Line" metaphor for display
of trends. The graphic below shows the proposed KPI display across
the top of a browser screen with a descriptive example in the middle.
Any feedback would be wonderful!
Comments: Because of complex KPI names (e.g. This Week versus Last Week
Sales (All Divisions), KPIs were labeled with Roman numerals.
Balloon help could display the KPI name when the cursor brushes the
KPI indicator.
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