Enter management and test requirements into matrix and base lining requirements.
Design simulation models, especially for large systems.
Design man-machine interface (MMI) prototype - customer and user involvement.
Collect metrics - assign responsibility to configuration management to determine how to collect inexpensively and compare to data upon which bid was based early on for an "up-front" indicator of probability of making contract schedules.
Start user's manual.
Conduct two-phase Software Requirements Review (SRR) - the first to distribute and walk through the documents with all who will be involved in the review so they can take them away, write out all problems, and turn these back in; and the second to resent written answers to all written problems with the goal of either getting sign off on these responses or setting up a 1-2 person "tiger" team who will resolve discrepancies by a given date.