Re: use cases - what are they good for

Subject: Re: use cases - what are they good for
From: Tony Markos <ajmarkos -at- yahoo -dot- com>
To: "TECHWR-L" <techwr-l -at- lists -dot- techwr-l -dot- com>
Date: Wed, 12 Jan 2005 16:12:54 -0800 (PST)



Eileen:

Use cases suffer from a tragic flaw: They result in
a forced, artificial partitioning ("chunking" to us
TWs)of the system. This is guaranteed to produce a
disjointed and incomplete understanding of the system.

Only Data Flow Diagrams result in a logical, natural
partitioning of the system. Such a partitioning
will give you an integrated, comprehensive
understanding of the system. As Ed Yourdon (DFD guru)
says, "Only by following the flow of data can you come
up with an understanding of the underlying logic of a
system".

I have more than once come onboard an ongoing project
and used Data Flow Diagrams to save it from the
results of Use Cases.

Tony Markos
"Focused On The Essential Like A Laser"



--- "Neumann, Eileen" <ENeuman -at- franklintempleton -dot- ca>
wrote:


Hi Tech Whirl,

Does anyone use 'use cases' to develop / write
procedures? I've been investigating this topic,
and
it seems that use cases are very good for
explaining how various systems and / or people
interact....




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