Cost analysis is appropriate when factors affecting the purchase will not ensure a reasonable price because price analysis or another technique deemed appropriate to the goods or services being purchased do not suffice,and⁄or the Postal Service needs an understanding of the cost buildup of the proposal to verify cost realism and reasonableness. Cost or pricing data must be obtained before awarding a noncompetitive contract or modification whenever price analysis or another technique deemed appropriate to the goods or services being purchased is insufficient to determine reasonableness of price, and in certain circumstances suppliers are required to certify that the cost or pricing data they submit is accurate, complete, and current (see 2-34.14, Certification of Cost or Pricing Data). Cost analysis should be limited to cost elements that need detailed analysis to protect the Postal Service’s interest. When a limited number of cost elements will provide a reasonable analysis, the CO should obtain only the data needed to support such an analysis. Cost analysis is generally most useful when purchasing nonstandard items and services.