[AR] Re: SpaceX
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: Arocket List <arocket@xxxxxxxxxxxxx>
- Date: Sat, 10 Sep 2016 15:40:03 -0400 (EDT)
On Sat, 10 Sep 2016, John Schilling wrote:
Lesson hopefully learned: Do a sponge count, already. If your techs need to
use "rags" on flight hardware, a tray with Exactly N Standard Rags goes
inside the cordon, and when you're done a tray with Exactly N Standard Rags
(unfolded, so you can see nobody tore off a corner to use in a tight spot)
comes out. Counted with an eyewitness.
While checking such things is a good idea -- as witness "sponge count",
surgical teams have learned to count things like sponges and retractors
before sewing up the patient -- when you start insisting on eyewitnesses
and other forms of double-checking, you may be going too far. You can
quickly end up with wrenches going for SRB rides because although three
signatures said they were all accounted for, nobody actually looked.
Having five proofreaders is *less* effective, not more, than having one.
This has been repeatedly verified by experiment. :-)
(Better than counting sponges, actually, is to have a sponge tray -- in a
contrasting color -- with a pocket for each one. You can tell at a glance
whether there's a sponge in every pocket.)
Henry
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