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From: russ lyttle <lyttlec@removegmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Ada in command / control systems
Date: Mon, 11 Mar 2019 17:55:07 -0400
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Xref: reader01.eternal-september.org comp.lang.ada:55841
Date: 2019-03-11T17:55:07-04:00
List-Id: <comp.lang.ada>

On 3/11/19 1:01 PM, Simon Wright wrote:
> russ lyttle <lyttlec@removegmail.com> writes:
> 
>> I like using the diagrams as an engineering aid. Just not including
>> them in the requirements documents.
> 
> Completely agree that models to be automatically converted into code
> [even frameworks] can't be part of the requirements, they're part of the
> solution.
> 
>> Requirements are (should be) fixed and unchangeable.
> 
> Hollow laughter :-)
That line is always good for a few chuckles.
> 
>> The diagrams need to be dynamic and always reflect the current status
>> of the code.
> 
> Well, if your process requires that the model is updated first and the
> code regenerated, that will happen automatically. We did that.
> 

I've had projects where that happened. And many more where it didn't 
happen. The main stumbling block was that to change a high-level 
requirement required re-negotiating and amending the contract. Then the 
change has to trickle down through all the documentation and process'. I 
can recall one instance where that process took a year.