RE: Re: SIP is "just another Six Sigma measure"?

There is a very short tutorial on these manufacturing
operations terms at
http://hbswk.hbs.edu/pubcontent/toolkit/operations/index.htm
l .
If you know how to do laundry, this introduction will be
useful.

 "The purpose of this workbook is to provide a brief
introduction to the basic concepts found in operations. It
is intended for use in connection with the first-year
Technology and Operations Management course by students with
no or minimal background in operations. The workbook will
cover such terms as cycle time, process flow, work in
process and manufacturing lead-time. Finally, it will
illustrate how a complex operation can be broken down into
its components, described and mapped in a way that makes it
easier to understand and improve."

- Tom Poppendieck

-----Original Message-----
From: Kent Beck [mailto:[email protected]]
Sent: Tuesday, January 21, 2003 12:25 PM
To: [email protected]
Subject: RE: [SIP] Re: SIP is "just another Six Sigma
measure"?

Suzuki "The New Manufacturing Challenge", p 131.
  * Cycle time: Time between the completion of the last
product and the completion of the next product
  * Production lead time: Time between beginning of
production and completion of production for a single product
-----Original Message-----
From:
sentto-8007113-370-1043166342-kent=threeriversinstitute.org@
returns.groups.yahoo.com
[mailto:sentto-8007113-370-1043166342-kent=threeriversinstit
[email protected]] On Behalf Of Dossy
Sent: Tuesday, January 21, 2003 8:26 AM
To: [email protected]
Subject: Re: [SIP] Re: SIP is "just another Six Sigma
measure"?
On 2003.01.21, Kent Beck <[email protected]>
wrote:
> As I understand it, the manufacturing jargon for what SIP
measures is
> "production lead time". Cycle time is the pace at which
finished goods
> leave the line. This won't make a big difference unless
we're talking to
> real manufacturing people.

That's odd.  My understanding of "cycle time" was that it's
the time it
takes for a single product to be created.  In software
development
jargon, I'd measure "cycle time" as the elapsed time from
when a
customer requests a feature until the time they receive it.

Maybe I misunderstood or misread your writings on SIP, but I
thought
that SIP was this exact same measure of elapsed time.  Was I
mistaken?

-- Dossy

--
Dossy Shiobara                       mail:
[email protected]
Panoptic Computer Network             web:
http://www.panoptic.com/
  "He realized the fastest way to change is to laugh at your
own
    folly -- then you can let go and quickly move on." (p.
70)


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