Thanks for forwarding this Ira - David Linthicum has been one of my
strongest technology influences over the past several years (I've told
him that). He is also local to the DC area (he lives in Centerville VA),
in case we'd ever like to have him speak at an event (I would be happy
to broker this). (01)
Before getting into my observations, I would like to point out that
Toyota actually has *four* steps to SOA[1]. Will we soon be down to only
one?:) (02)
One thing that I would like to point out about Dave's presentation -
which I know he would agree with as an observation - is that his 12
steps are somewhat of a bottom-up approach to SOA, which is probably the
most frequent approach that one will see; but not the only one. I say
this because he doesn't arrive at defining processes until step 9 (so
it's more like "deriving" processes from services), whereas a more
"top-down" approach would come at it from above and decompose processes
into services. (03)
Both approaches are, in general, valid - it all depends on what problem
you are trying to solve, the scope, the funding, etc. I used quotes for
"top-down" because when I hear that, I always ask myself: top of what? A
function within a department? A department within an organization? An
organization itself? etc. And if you are at the "top" of a department
within an organization, from the standpoint of the organization itself
you are really doing "bottom-up" SOA anyway. (04)
I think all would agree that if one is doing "top-down" SOA at the
highest level (the enterprise level), then you are doing enterprise
architecture, in a service-oriented manner (what some may call
"service-oriented enterprise architecture"). Other than that, one should
always question what "top" means. (05)
Joe (06)
[1]
http://www.computerworld.com/developmenttopics/development/webservices/s
tory/0,10801,109387,00.html?source=x606
"Four Steps To SOA" (07)
Joseph Chiusano
Associate
Booz Allen Hamilton (08)
700 13th St. NW, Suite 1100
Washington, DC 20005
O: 202-508-6514
C: 202-251-0731
Visit us online@ http://www.boozallen.com (09)
-----Original Message-----
From: soa-forum-bounces@xxxxxxxxxxxxxx
[mailto:soa-forum-bounces@xxxxxxxxxxxxxx] On Behalf Of Ira M. Grossman
Sent: Thursday, March 30, 2006 5:51 PM
To: soa-forum@xxxxxxxxxxxxxx; CAF Mailing List; CAF Forum
Subject: [soa-forum] "12 Steps to SOA" Excellent SOA Presentation and
Podcast (010)
I heard David Linthicum's keynote at the EA Conference in Orlando FL on
March 22, 2006. His "12 Steps to SOA" Keynote presentation and podcast (011)
can be found at (012)
http://soaexpertpodcast.libsyn.com/index.php?post_id=72115 (013)
David's keynote was the best and clearest explanation of what is a
Service Oriented Architecture (SOA). For convenience I attached the
PowerPoint slides which can be downloaded from the above URL. (014)
The presentation helped me better understand the concepts of SOA.. (015)
Ira Grossman
Chair, Chief Architects Forum (016)
-- (017)
Ira M. Grossman
NOAA OCIO
Chief Enterprise Architect
1315 East West Highway (CIO-PPA1)
SSMC3 Room 9752
Silver Spring MD 20910
ph 301 713 3345 ext 140
cell 301 266 0157
fax 301 713 3554
ira.m.grossman@xxxxxxxx (018)
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