Talk:Personal software process
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Advantage of Personal Software Process over extreme programming
Is there any connection between this PSP (Personal Software Process) and TSP (Team Software Process)?
Face 13:32, 5 March 2006 (UTC)
Yes, they are connected. --Ralph Corderoy 12:04, 10 July 2006 (UTC)
This entry seems rather inaccurate in that the main emphasis of PSP is to use self-collected data and statistical methods to establish practical personal process limits for effort estimation. Reviews and quality control are important, but mainly to serve the goal of controlling the overall process of development. Control in this context means being able to identify the expected range of effort and quality with a reasonable level of certainty. The emphasis is on predictability, not perfection. --—Preceding unsigned comment added by 216.254.31.189 (talk • contribs) I agree. PSP is primarily, AFAIUI, concerned with building a statistical model of the coder's performance in order to better predict future performance. --Ralph Corderoy 12:07, 10 July 2006 (UTC)
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This statement from the opening:
"more than 2/3 of the projects shipped were without any defects"
Seems preposterous on its face. Almost no software of any complexity is "without defects". It is probably more correct to say the projects met a certain quality bar. Most people involved in software would say that "perfect quality" is too expensive to be commercially feasible. —Preceding unsigned comment added by 24.16.13.198 (talk) 02:05, 25 October 2009 (UTC)
- Exactly. Considering companies who have high quality standards such as Microsoft ship complex software with literally hundreds of uncovered bugs, we can almost conclude that the statement is a shameless self promotion, or a word play on the definition of "defect", or both. —Preceding unsigned comment added by 15.243.169.73 (talk) 14:11, 1 February 2010 (UTC)
- I have yet to find a software process that can even reliably determine whether a software system contains defects. How was this metric even determined? The PSP book is peppered with marketing-speak claims like this with no real citations. —Preceding unsigned comment added by Ansciath (talk • contribs) 21:45, 14 February 2010 (UTC)
- I've been learning and using PSP and the claim that "2/3 of the projects shipped were without any defects" most probably means that there were no defects found in the testing phase. PSP attempts to find the bugs you introduce into your software early by having phases such as Design Review and Code Review in an effort to prevent bugs from getting to the testing phase. —Preceding unsigned comment added by Haxhia (talk • contribs) 11:35, 21 July 2010 (UTC)
- I have had some experience with persons who work with PSP, and their definition is somewhat different from the idea that there are no defects in the code, literally. Rather, they define "defect free" as meaning that the customer did not report any defects. So, from the customer's perspective, the product was "defect free". — Preceding unsigned comment added by Joshuadw (talk • contribs) 17:52, 31 May 2011 (UTC)
- Still, Microsoft updates everyday patches, updates... most of them only to correct bugs that were mostly discovered by customer! so even the last definition let me doubt that 2/3 of the projets were "defect free". Maybe 2/3 of the functionnalities, maybee --80.254.148.59 (talk) 12:52, 15 August 2011 (UTC)
- There is no reason to believe that Microsoft (Redmond) uses PSP merely because Microsoft (India) reports great success with it. To determine whether the statement about 2/3 of the projects being defect-free is accurate you need to find out what projects were delivered by Microsoft (India).
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