A chain is only as strong as its weakest link. The strength of all other links is irrelevant. A better measure for a deal like this is the geometric mean of i

A chain is only as strong as its weakest link. The strength of all other links is irrelevant. A better measure for a deal like this is the geometric mean of its components. If one component is zero, the entire deal is worth zero, but otherwise each component contributes to the aggregate value of the deal.