[SystemSafety] Safety Culture redux (David Green)

[paul_e.bennett at topmail.co.uk]

On 24/02/2018 at 7:26 AM, "Steve Tockey" <Steve.Tockey at construx.com> wrote:
>
>My experience is that coding and developer testing should take no 
>more than 10% of a software project’s effort. The industry average 
>is reported to be closer to 60%.

I don't know many who have measured the time taken to get the requirements
specification tested and fixed before they begin the development. This is my
first task when a spec lands on my desk. It usually involves a lot of Q&A
communication between the client and provider and I have seen it burn up to
30% of the schedule. However, once something that is more coherent emerges,
the latter development goes quicker than expected with testing and review
being about 30% of the remainder. Especially with hardware development as
part of the project. That 30% includes coders own testing and the Fagan style
inspections that are part of the review process.

These figures are provided by a totally manually applied development process
that does not employ software tools for tasks that the mark one eyeball can do
so much better.

Regards

Paul E. Bennett IEng MIET
Systems Engineer
Lunar Mission One Ambassador
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Paul E. Bennett IEng MIET.....
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