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Phillips emphasized his need for a complete understanding of all tradeoffs associated with this figure, to allow a real-time estimate of the requirement to hold. He asked James and Low to summarize for him several such tradeoffs before the Apollo 7 flight readiness review: wind versus safety, velocity versus direction, and conservative assumption versus technical accuracy. Also, he asked for criticality and failure mode for each of the above tradeoffs to allow a technical evaluation of increasing the 45-kilometer constraint. At the same time, he asked that a similar effort be initiated for the Saturn V.