The customer returned several expensive manufacturing components, complaining about poor quality and fearing product returns. The project manager believes quality was maintained. How should the project manager communicate to reassure the customer that quality was produced?

The project manager should show the customer the quality control measurements. This directly addresses the customer's concern by providing objective evidence that the product met specified quality standards. Quality control measurements demonstrate that the product was inspected and verified against requirements throughout the production process. Presenting tolerance and control limits alone might be too technical and not directly show product quality. Providing sample results from the current batch is good, but quality control measurements offer a more comprehensive view of the entire production process's adherence to quality. Historical sample quality data is less relevant to the current batch's quality issues.