I question how productive someone working 12 hours a day, 7 days a week for multiple weeks, can actually be. NASA's software engineers come in and work hard wr

I question how productive someone working 12 hours a day, 7 days a week for multiple weeks, can actually be. NASA's software engineers come in and work hard writing truly mission-critical software for 8 hours a day, 5 days a week. Then they stop. NASA found that going over 40 hours a week resulted in more bugs and errors, which meant that ultimately it took longer to produce the desired software at the desired level of quality.