What is the most desirable method for evaluating a supplier?

• A. A history evaluation.
• B. A price-based checklist.
• C. An on-site inspection only.
• D. A supplier self-assessment.

Answer: (A)

Relying on a history of supplier performance provides the most reliable picture of how a supplier will behave in the future. Past data combine multiple dimensions—quality of parts, defect rates, on-time delivery, responsiveness, and how well issues are resolved—into a track record you can assess over time. This historical view helps you predict consistency, risk, and overall reliability much better than a single snapshot.

A history-based evaluation also supports objective comparisons between suppliers, highlights trends (improvements or deteriorations), and informs decisions about supplier development or risk mitigation. It reduces the influence of one-time factors and biased impressions.

Other methods offer useful insights but are limited when used alone. A price-based checklist focuses only on cost and can miss quality and reliability. An on-site inspection provides only a momentary view and may not reflect ongoing performance. A supplier self-assessment can be biased and lacks independent verification.