tag:blogger.com,1999:blog-20843954.post6929177122208945797..comments2024-02-22T13:43:48.846+01:00Comments on Kallokain: By The BookKallokainhttp://www.blogger.com/profile/15756733532883677794noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-20843954.post-47189652451611175982007-06-12T16:27:00.000+02:002007-06-12T16:27:00.000+02:00Ah, I should have read further. I got too excited...Ah, I should have read further. I got too excited at the prospect of your book and posted my comment before I saw your link to Lean Software Development later on!mtnygardhttps://www.blogger.com/profile/01683596894853322419noreply@blogger.comtag:blogger.com,1999:blog-20843954.post-9298700797689137142007-06-12T16:23:00.000+02:002007-06-12T16:23:00.000+02:00Henrik,I am delighted to see that you are working ...Henrik,<BR/><BR/>I am delighted to see that you are working on such a book. I have long wanted to see an application of ToC and throughput accounting to software development.<BR/><BR/>If you have not already read them, I strongly recommend the Poppendieck's books on Lean Software Development. There are obvious parallels between Lean and ToC.<BR/><BR/>Regards,<BR/>Michael T. Nygard<BR/>mtnygard@charter.net<BR/>http://www.michaelnygard.com/<BR/><BR/>Author of "Release It!"<BR/>http://pragmaticprogrammer.com/titles/mnee/index.htmlmtnygardhttps://www.blogger.com/profile/01683596894853322419noreply@blogger.comtag:blogger.com,1999:blog-20843954.post-32764809689535749052007-05-27T18:54:00.000+02:002007-05-27T18:54:00.000+02:00"angers" should be "managers" of course. Sometimes..."angers" should be "managers" of course. Sometimes my fingers do not type what my brain tells them to.Kallokainhttps://www.blogger.com/profile/15756733532883677794noreply@blogger.comtag:blogger.com,1999:blog-20843954.post-79464997215305485522007-05-27T18:52:00.000+02:002007-05-27T18:52:00.000+02:001) The measure used for the output of the teams, s...1) The measure used for the output of the teams, story points, is probably not comparable across teams.<BR/><BR/>True. In real life, it would not be directly comparable. In this example, it just indicates that both teams deliver equal value.<BR/><BR/>(I'll rephrase the example in the book so this becomes more clear. Thank you for the input.)<BR/><BR/>It is worth noting that SP is a kind of proxy for money. You can translate SP to monetary value, but unfortunately not until after the project, and probably a maintenance project or two, has finished.<BR/><BR/>2) Does it matter if the cost is higher for fixing a defect for one of the teams, if we take the 80sp/month metric to mean that both teams consistently deliver the same amount of value per month? Isn't measuring at that level measuring at too low a level of detail.<BR/><BR/>Both teams consistently delivered 80 SP/month <I>before</I> the pesky defect interfered. Part of the answer lies in figuring out what happens when the defect appears.<BR/><BR/>Miscalculating the defect cost can have a direct impact on management decisions. I believe that it often does. If more angers were aware of the actual costs of defects, we would see a very different approach to project management, but we would also see large effects in line organization, and training budgets.<BR/><BR/>I'll get back with an actual answer to the problem in a couple of days.Kallokainhttps://www.blogger.com/profile/15756733532883677794noreply@blogger.comtag:blogger.com,1999:blog-20843954.post-18930583900334963072007-05-27T11:40:00.000+02:002007-05-27T11:40:00.000+02:00This got me thinking. If I know you right, I'm gue...This got me thinking. If I know you right, I'm guessing you'll be able to show an increased cost for the bottlenecked team, probably via a calculation of the value of a story point and possibly using a calculation of an opportunity lost.<BR/><BR/>However, two thoughts enter my mind spontaneously:<BR/><BR/>1) The measure used for the output of the teams, story points, is probably not comparable across teams.<BR/>2) Does it matter if the cost is higher for fixing a defect for one of the teams, if we take the 80sp/month metric to mean that both teams consistently deliver the same amount of value per month? Isn't measuring at that level measuring at too low a level of detail.<BR/><BR/>Just a couple of quick thoughts. Looking forward to your next post.Anonymousnoreply@blogger.com