When you say "agreed with the provider" does that mean you have signed the contract? Obviously at that point the Target is fixed and any change to that would be managed through the compensation event process - but only for things that are a compensation event. In this case it is unlikely to be a CE, unless the Scope specifically dictated the use of that material and/or supplier.
If you have not yet signed the contract, you are unlikely to sign a contract now you know you you can not meet the programme for or do it for that price. Whether they can
"make" you sign it at that point then becomes a legal issue, but I have never seen a Client take a Contractor to court for not signing up to a contract they now know before signing they can not achieve.
If you have not yet signed the contract, you are unlikely to sign a contract now you know you you can not meet the programme for or do it for that price. Whether they can
"make" you sign it at that point then becomes a legal issue, but I have never seen a Client take a Contractor to court for not signing up to a contract they now know before signing they can not achieve.