Which of the following is NOT listed as a potential data source for cost estimating?

• A. POM
• B. Personal blogs
• C. Industry Guides
• D. Manpower reports

Answer: (B)

In cost estimating, you rely on formal, verifiable data sources to ensure accuracy and defensibility. Official budget documents like the Program Objective Memorandum (POM) provide structured, program-level cost data and funding plans. Industry guides offer benchmark cost data and methods that reflect broader market practices. Manpower reports supply validated labor data, including staffing levels and wage or burden rates, which are essential for calculating personnel costs. These sources are consistent, citable, and regularly updated, making them appropriate for disciplined estimation.

Personal blogs, by contrast, are informal and typically lack verification, standardization, and current relevance. They can introduce bias or outdated information, which undermines the reliability of a formal cost estimate. Because of that, they aren’t considered suitable data sources for cost estimating.