Which of the following factors is not involved in supplier rating?  A. Quality  B. Price  C. Proximity  D. Performance

To determine which factor is not typically involved in supplier rating, we first need to examine the common criteria used in supplier evaluations:

1. Quality: This criterion assesses the standard of the goods or services provided by the supplier. High-quality products are crucial for maintaining the overall quality of the final product.

2. Price: This factor evaluates the cost of goods or services supplied by the vendor. Competitive pricing can significantly impact the supplier selection process.

3. Proximity: This details the geographical location of the supplier in relation to the buyer. Proximity can be important for logistics and transportation costs, but it is not a core factor for all supplier ratings.

4. Performance: This measures how well the supplier meets the agreed-upon service levels, delivery times, and other performance metrics.

Based on this analysis, C. Proximity is often considered less essential compared to the other three factors (Quality, Price, and Performance) when it comes to comprehensive supplier rating systems. Thus, proximity can be deemed the least involved in a formal supplier rating process.

Final Answer

C. Proximity is not involved in supplier rating.