Dear Europcar, if you want my feedback, you should make it easy.

I’m giving you information to improve your business. If I don’t want to provide my phone number to you, you should not force me to by producing the error: Please provide an answer to all questions before submitting.

Because:

I’m doing you a favour by replying. I don’t want you to give me [...]

Six Sigma definitions

Some Six Sigma definitions which I’ve collected over time.

Term Definition CTQs Critical To Quality.  The sort list of the most important customer wants. Customer Any internal/external person/organisation who receives the output of a process. Customer Requirements The needs and expectations of the customer.  Which is translated into measurable terms.  Used in the process [...]