If you have a long training period for (say) five guys ... what happens if one of them washes out? Do the other four guys have to re-take the whole training? Obviously not.
For our current (classic-era) campaign we've worked up the training schedule for an "ordinary" Morrow Project member. The bigger MARS and Science teams might be a bit different, of course.
http://asmrb.pbworks.com/w/page/4595...Generation%201
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Michael B.