DFR need a lot more. here is the flavor
http://www.dfrsolutions.com/software/see-what-sherlock-can-do-for-you-2/
> It depends.
>
> There are SO many factors affecting initial joint strength, pad size being
> just one. The perfect pad size, in the wrong place, with the wrong solder
> or poor processing can make a very weak joint.
>
> And still, it's no measure of reliability. Poor solder joints are more
> likely to be weak. Poor solder joints are more likely to be less
> reliable. But poor older joints could pass an initial pull test and still
> propagate cracks and fail later in life.
>
> Peter
>
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