Yes, one day at a time is the answer for job cost evaluation too. Since I started job costing projects on a daily basis (years ago) instead of weekly or when the project was done I was able to make decisions to better manage cost of operations. The initial higher cost of an employees daily job expenditures results in better overall job performance and higher profits in the end.

Now, I'm not sure NASA projects can be cost analyzed on a daily basis but surely on an interim schedule to better manage projects.
NASA management in all levels should be reviewed on a semi-annual basis too.

SteveS