tag:blogger.com,1999:blog-9212598583517336757.post8720315390235796458..comments2024-03-26T05:53:32.812-07:00Comments on Agile Tips: Average velocity from High School Physics and Agile ProjectsPaulo Carolihttp://www.blogger.com/profile/09825058582367262895noreply@blogger.comBlogger12125tag:blogger.com,1999:blog-9212598583517336757.post-17421813937053412732019-08-08T04:46:38.116-07:002019-08-08T04:46:38.116-07:00Thanks mate for such informative blog. Reading thi...Thanks mate for such informative blog. Reading this my all queries got solved. 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I ...I can see that you are an expert at your field! I am launching a website soon, and your information will be very useful for me. Thanks for all your help and wishing you all the success in your business. Please come visit my site <a href="http://www.VentilatingHeating.com" rel="nofollow">Speech Pathology</a> and give me any valuable feedbacks.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-9212598583517336757.post-3637830844559528852009-03-24T21:13:00.000-07:002009-03-24T21:13:00.000-07:00Hey Fred,Thanks for the comment.My next blog post ...Hey Fred,<BR/>Thanks for the comment.<BR/>My next blog post (<A HREF="http://agiletips.blogspot.com/2009/03/team-acceleration-concept.html" REL="nofollow"> the team acceleration concept </A>) provides a way to measure variability in Velocity. I found agile acceleration useful for forecasting (or at least trying to) the velocity for teams in early stage of a project.<BR/>Your entry on (<A HREF="http://fredtingey.com/?p=87" REL="nofollow"> “Volatility of Velocity” </A> very good. It is interesting to see the statistics formulas applied to the day to day Agile concept such as iteration length and story size.<BR/>Cheers,<BR/>PauloPaulo Carolihttps://www.blogger.com/profile/09825058582367262895noreply@blogger.comtag:blogger.com,1999:blog-9212598583517336757.post-2615301850475901342009-02-21T02:30:00.000-08:002009-02-21T02:30:00.000-08:00I too have suffered from a variability in Velocity...I too have suffered from a variability in Velocity (commonly at the early and late stages of a project) and certainly find averages useful. <BR/>It is possible to alter the 'variability' in velocity by altering the size of your stories, the length of your iterations, the amount of time you work and of course your estimating ability. I posted some <A HREF="http://fredtingey.com/" REL="nofollow">simple analysis</A> on this and for example you would need to both double your iteration length and halve your story size to reduce variability by 50%.Fred Tingeyhttps://www.blogger.com/profile/01197155608105656113noreply@blogger.comtag:blogger.com,1999:blog-9212598583517336757.post-10500169181389169782009-02-20T12:04:00.000-08:002009-02-20T12:04:00.000-08:00This is why people use other statistics for this s...This is why people use other statistics for this sort of thing. <BR/><BR/>Some people like sum of squares/euclidian distance (for your example, 20), or median (23). <BR/><BR/>Another is a to give more weight to later iterations. All else being equal (All else is never equal), the next iteration should look more like the last several than like the ones before it. <BR/><BR/>This I think is especially true because people revise their 'unit of work' over time, based on past experience, and, most importantly, expectations. It's very difficult to measure things when people know they're being measured. If you place too much emphasis on the measuring (measuring becomes judging), you get metric dysfunction. I don't think I have to tell you how much worse that situation is than flying blind, but trust me, it is very much worse.Jasonhttps://www.blogger.com/profile/00178931856869709627noreply@blogger.comtag:blogger.com,1999:blog-9212598583517336757.post-4719825248048480852009-02-18T22:02:00.000-08:002009-02-18T22:02:00.000-08:00I agree with you. I typically use the average Velo...I agree with you. I typically use the average Velocity as a basis for the future commitments. But as you said, using the average Velocity without trimming is not a good idea.Paulo Carolihttps://www.blogger.com/profile/09825058582367262895noreply@blogger.comtag:blogger.com,1999:blog-9212598583517336757.post-63748921057365749532009-02-18T11:34:00.000-08:002009-02-18T11:34:00.000-08:00You have to be careful with average velocity. I'v...You have to be careful with average velocity. I've been on projects where people panic because the average velocity makes the project look like it is failing. The problem with average velocity is that there are always outliers, usually from the first few iterations, that skew the average. For example if you have the following velocities for the first 7 iterations (0,5,14,23,26,32,23) your average velocity is 17. But if you remove the outliers (0,5,14) your velocity is 26. Using an average without trimming is IMO a bad idea.Shlomohttps://www.blogger.com/profile/01165462366964097266noreply@blogger.com