Although the risks of offshore drilling are much harder to quantify than the benefits, I believe the shift in the benefit-cost ratio has been large enough so that the time has come to allow drilling.

You need the architect's skills to assess feasibility and costs of features for the project manager to be able to define the cost/benefit ratio.

This phased approach means that the cost-to-benefit ratio isn't rosy either, and unless the head team can deploy aggressively and successfully, the project is at risk of being shut down.