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From: russ lyttle <lyttlec@removegmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Ada in command / control systems
Date: Sat, 9 Mar 2019 13:34:52 -0500
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Xref: reader01.eternal-september.org comp.lang.ada:55820
Date: 2019-03-09T13:34:52-05:00
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On 3/9/19 3:16 AM, Simon Wright wrote:
> russ lyttle <lyttlec@removegmail.com> writes:
> 
>> Which brings up a recurring debate. If there is a conflict between two
>> diagrams, which takes precedence?
> 
> Neither, in my view (as a purist): there's a contradiction which needs
> to be resolved.
> 
It's resolving the contradiction that is the problem. If I'm the 
software engineer, I will claim neither is required and the buyer will 
have to pay more if he wants either. If I'm the buyer I will claim the 
contract requires both and no extra money is due.

I've had to deal with several contractors who would find such instances 
and underbid to get the contract. They would then try to "get well" by 
demanding more money to fix the problem. One guy I had to deal with only 
had lawyers on staff. He hired temp software developers if needed.

Diagrams are much more difficult to maintain than text. During the life 
of the project, they tend to fall more and more out of synch. How does 
your automated requirements tracker diff two diagrams?