The correct answer is B because, according to NCMA CMBOK and best-value tradeoff principles, when a buyer selects a higher-priced proposal , the decision must be clearly justified and documented . This documentation explains why the additional benefits-such as superior technical capability, lower risk, or better past performance-are worth the increased cost.
CMBOK emphasizes that in a tradeoff source selection , cost/price is only one factor among several, and the buyer may decide that a higher-priced proposal offers greater overall value. However, this decision must be supported by a well-reasoned analysis that demonstrates how the benefits outweigh the additional cost. This rationale must be documented in the contract file to ensure transparency, accountability, and defensibility, especially in the event of audits or protests.
Option A is incorrect because there is no fixed percentage limit in tradeoff decisions. Option C is incorrect because benefits are not limited to delivery time. Option D is incorrect because small business participation may be a factor but is not a required justification.
CMBOK highlights that proper documentation of tradeoff decisions is essential to uphold fairness, integrity, and compliance in the award phase , ensuring that best-value determinations are logical and defensible.