Contribution 38 - Revision history

http://commons.oreilly.com/wiki/index.php?title=Contribution_38&action=history&feed=atom Contribution 38 - Revision history 2013-05-21T17:58:19Z Revision history for this page on the wiki MediaWiki 1.11.0 http://commons.oreilly.com/wiki/index.php?title=Contribution_38&diff=11376&oldid=prev Rmonson at 22:05, 2 July 2008 2008-07-02T22:05:55Z

<p></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr> <td colspan='2' style="background-color: white; color:black;">←Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 22:05, 2 July 2008</td> </tr> <tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>== Time Is Money ==</div></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>== Community ==</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">I think that ''when'' I make design choices is as important as ''what'' design choices I </del>make. <del style="color: red; font-weight: bold; text-decoration: none;">There is </del>a <del style="color: red; font-weight: bold; text-decoration: none;">psychological component to timing</del>, <del style="color: red; font-weight: bold; text-decoration: none;">such as </del>the <del style="color: red; font-weight: bold; text-decoration: none;">need to see immediate progress or </del>the <del style="color: red; font-weight: bold; text-decoration: none;">need to feel safe for </del>the <del style="color: red; font-weight: bold; text-decoration: none;">future</del>. <del style="color: red; font-weight: bold; text-decoration: none;">However, </del>the <del style="color: red; font-weight: bold; text-decoration: none;">biggest motivation for paying attention to timing </del>is <del style="color: red; font-weight: bold; text-decoration: none;">economic</del>.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">As the architect, you </ins>make <ins style="color: red; font-weight: bold; text-decoration: none;">decisions that will affect the community revolving around your project for many years</ins>. <ins style="color: red; font-weight: bold; text-decoration: none;"> In </ins>a <ins style="color: red; font-weight: bold; text-decoration: none;">way</ins>, the <ins style="color: red; font-weight: bold; text-decoration: none;">software design itself is part of </ins>the <ins style="color: red; font-weight: bold; text-decoration: none;">architecture. The way people come into </ins>the <ins style="color: red; font-weight: bold; text-decoration: none;">community and the way people leave are also part of it</ins>. <ins style="color: red; font-weight: bold; text-decoration: none;"> A complicated architecture is difficult because </ins>the <ins style="color: red; font-weight: bold; text-decoration: none;">connections between the parts are blurred by the volume of noise, and many good people turn away. An architecture simple by decree </ins>is <ins style="color: red; font-weight: bold; text-decoration: none;">hard to work with because only things declared simple are allowed, and people feel helpless</ins>.</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The fundamental law of money is that a dollar today is greater than a dollar tomorrow. I can invest the dollar I hold today, giving me a fraction more than a dollar tomorrow. In evaluating two revenue streams, timing is as important as magnitude. If you tell me, "In scenario A you spend $10 to make $50, in scenario B you spend $20 to make $40," I don't know which is the better deal until you tell me ''when'' I spend and make the money.</div></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">To evaluate a single cash flow, take the amount at a given time and ''discount'' it back to today. Thus, $10 in one year at an interest rate of %5 is the same as $9.52 today. To evaluate a compound cash flow (a series of payments in and out), discount them all and sum the result. This calculation is ''net present value''.</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">By [[Evan Cofsky]]</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">If the interest rate </del>is <del style="color: red; font-weight: bold; text-decoration: none;">really 5%, </del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">This work </ins>is <ins style="color: red; font-weight: bold; text-decoration: none;">licensed under a</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[http://creativecommons.org/licenses/by/3.0/us/ Creative Commons Attribution 3] </ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">== not done yet ==</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">Back to [[97 Things Every Software Architect Should Know]] home page</ins></div></td></tr>  </table>

Rmonson http://commons.oreilly.com/wiki/index.php?title=Contribution_38&diff=11079&oldid=prev Kentbeck at 17:44, 6 June 2008 2008-06-06T17:44:24Z

<p></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr> <td colspan='2' style="background-color: white; color:black;">←Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 17:44, 6 June 2008</td> </tr> <tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Time Is Money</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">== </ins>Time Is Money <ins style="color: red; font-weight: bold; text-decoration: none;">==</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div> </div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div> </div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">I think that ''when'' I make design choices is as important as ''what'' design choices I make. There is a psychological component to timing, such as the need to see immediate progress or the need to feel safe for the future. However, the biggest motivation for paying attention to timing is economic.</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div> </div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">The fundamental law of money is that a dollar today is greater than a dollar tomorrow. I can invest the dollar I hold today, giving me a fraction more than a dollar tomorrow. In evaluating two revenue streams, timing is as important as magnitude. If you tell me, "In scenario A you spend $10 to make $50, in scenario B you spend $20 to make $40," I don't know which is the better deal until you tell me ''when'' I spend and make the money.</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div> </div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">To evaluate a single cash flow, take the amount at a given time and ''discount'' it back to today. Thus, $10 in one year at an interest rate of %5 is the same as $9.52 today. To evaluate a compound cash flow (a series of payments in and out), discount them all and sum the result. This calculation is ''net present value''.</ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div> </div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">If the interest rate is really 5%, </ins></div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div> </div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">== not done yet ==</ins></div></td></tr>  </table>

Kentbeck http://commons.oreilly.com/wiki/index.php?title=Contribution_38&diff=11063&oldid=prev Kentbeck at 15:51, 4 June 2008 2008-06-04T15:51:33Z

<p></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr> <td colspan='2' style="background-color: white; color:black;">←Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 15:51, 4 June 2008</td> </tr> <tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div> </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">Time Is Money</ins></div></td></tr>  </table>

Kentbeck http://commons.oreilly.com/wiki/index.php?title=Contribution_38&diff=11060&oldid=prev Wmr513: Removing all content from page 2008-06-03T15:52:02Z

<p>Removing all content from page</p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr> <td colspan='2' style="background-color: white; color:black;">←Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 15:52, 3 June 2008</td> </tr> <tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>== Keep Up Your Technology Skills ==</div></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>in progress...</div></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>By [[Mark Richards]]</div></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>This work is licensed under a</div></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[http://creativecommons.org/licenses/by/3.0/us/ Creative Commons Attribution 3] </div></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"></td><td colspan="2"> </td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Back to [[97 Things Every Software Architect Should Know]] home page</div></td><td colspan="2"> </td></tr>  </table>

Wmr513 http://commons.oreilly.com/wiki/index.php?title=Contribution_38&diff=11058&oldid=prev Wmr513 at 15:50, 3 June 2008 2008-06-03T15:50:34Z

<p></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr> <td colspan='2' style="background-color: white; color:black;">←Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 15:50, 3 June 2008</td> </tr> <tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Keep Up Your Technology Skills ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Keep Up Your Technology Skills ==</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>in progress...</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>By [[Mark Richards]]</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>This work is licensed under a</div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>[http://creativecommons.org/licenses/by/3.0/us/ Creative Commons Attribution 3] </div></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"></td></tr> <tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Back to [[97 Things Every Software Architect Should Know]] home page</div></td></tr>  </table>

Wmr513 http://commons.oreilly.com/wiki/index.php?title=Contribution_38&diff=11057&oldid=prev Wmr513: New page: == Keep Up Your Technology Skills == 2008-06-03T15:44:58Z

<p>New page: == Keep Up Your Technology Skills ==</p> <p><b>New page</b></p><div>== Keep Up Your Technology Skills ==</div>

Wmr513