Re: Re: SIP is not Takt Time

On Monday, February 10, 2003, at 4:22:21 AM, Rachel Davies wrote:

> I work in an XP team and SIP it seems to me is a measure of the effectiveness of both the Customer and
> Development team in XP (rather that by the book XP where the main measure is Velocity). Velocity just
> measures of how good your Development teams estimates are to give the Customer team an idea of likely
> delivery dates.

Yes ... I'd say that it covers the whole organization, not just
customer/developer, in fact.

> SIP appears a more embracing measure because it covers the effectiveness of the whole organisation. For
> example, I can imagine an XP team that delivers the number of stories it promises every iteration quite
> accurately but a backlog building up due to lack of resource.

I'm not clear on whether SIP starts when Marketing says "We need a feature
to frangle the ardeleth, or when the customer has written the acceptance
tests for ardeleth frangling. From Kent's words, I have been assuming the
latter.

When does a product idea become more than an idea and begin to be SIP?

> Also stories may have long SIP because they are of lower business value
> that others (so they take a long time to get planned in and even then may
> get booted out of an iteration), thus they are in the queue/pipeline a
> longer time, so SIP may be an indication of Customer team spending time
> on specifying low value stories.

Yes, this is consistent with my understanding of SIP. Writing the test (or
otherwise fully specifying a story) starts the SIP clock. So if you then
don't schedule it, you're wasting SIP.

Kent, I would value your thoughts at this point ...

Ron Jeffries
www.XProgramming.com
First they ignore you, then they laugh at you, then they fight you, then you win.
  - Gandhi


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