Hi,
I have read some words in IATF16949 of "If required by the customer" so what is its meaning? How can I know in this issue? Is it needed to ask if to the customer?
It means that if a customer states something as a requirement, such as in the purchase order or other contract document, you are required to do it. Particular characteristics and specifications of a good or service are examples. Also see: https://elsmar.com/Forums/tags.php?tag=customer+requirements
Thank you very much for your suggestion.
In case, we don't have any supplier manual and specific requirement from customer so is it needed to ask it from him?
I think it would be very wise to ask and discuss with your customer. Remember, they can be many places such as on a purchase order. Talk with them so that you are sure you know exactly what your customer requirements are.
You may initiate a form includes user requirements specifications (URS) which includes all end user requirements which will be assumed to be the real customer compared to the supplied service/equipment.