While performing a quality system audit of a potential supplier, you notice that control charts used to monitor a critical process show that process to be unstable. In a later conversation with the plant’s quality manager, he tries to assure you that all of his processes are statistically capable of meeting your specifications and that the company would be able to meet your delivery requirements. You should respond by:

1) recommending that the company be added to your list of approved suppliers.

2) beginning negotiations for a suitable price for the product.

3) voicing your concerns for his claims of process capability.

4) both a and b would be suitable responses.

5) immediately purchasing stock in his company.