Re: [Ecrit] Performance Requirement

[Andrew Newton <andy at hxr.us>]

On Aug 2, 2005, at 8:18 AM, Brian Rosen wrote:

> Rohan suggested we remove the D5 requirement and replace it with a  
> motivational section, since there was no requirement.  I think we  
> should have a concrete goal, with a motivation for how we came to  
> the goal.  I propose:
>
>
>
> The time required to map SHOULD be 500ms, assuming normal caching  
> strategies in the mechanism work.  The maximum time SHOULD be 1  
> second.
>
>
>
> Motivation: Total time from last digit pressed to ring at the PSAP  
> should be two seconds.  Allocating one quarter of that to the  
> mapping mechanism seems reasonable, and achievable if caching  
> mechanisms work well enough for a single element to determine the  
> mapping.
I believe that if we continue applying 2119 language, then specifying  
it as a gaol or a requirement has no difference.  Also, the mechanism  
specifies caching.  Given we don't know what the requirements are for  
caching, we should avoid this language.

-andy

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