I agree with John. When it comes to claims, be FIRM but FAIR. And have good resources on construction costs so that claims can be evaluated against some sort of benchmark (is the contractor charging 15% more than industry pricing, or 315%?).
And client education - absolutely (but this works only to the point the client is willing to listen). That’s where credibility of the design team comes in. The more credible the documents and CA personnel, the better the chances of having a cooperative audience.
But the best way to difuse a claim-driven contractor is to remove weapons from his arsenal. There is no substitute you can buy from Amazon.com or anywhere else for a complete, well coordinated set of documents. Of course there are other factors, namely, the client wants it yesterday. In which case, I point out to clients the following:
Complete and Quality Documents.
Quick turn-around of Documents.
Low design fees.
Of these three attributes pertaining to the work products, unless they have unlimited time and money, they can pick any TWO they want. They don’t get all three. Its just a matter of which two. Its as simple as that. They need to understand that the two they select have a direct impact on the third.
They want it quick and cheap, then expect the quality to suffer.
They want it quick but of high quality, then expect it to cost more.
etc., etc.
Another good education tool would be to get the design team to review some of the RFI’s that come in. Let them see what sort of issues come up and questions get asked. Or better yet, have the CA take the design team member to a construction progress meeting. Let him/her sit there and listen to the documents come under fire by the contractor - in front of the client. And see the cost ramifications of the loopholes in the documents. And the client’s reaction. And the apparent helplessness of the CA when a credible defense can’t be mounted. It could be quite the eye opener.
Then, after the meeting, take the design team member aside and explain the subtleties of one of the basic tenets of the Contract Documents - the contractor bid, and is contractually required to build, only that which is indicated, and not what was INTENDED.
I believe that the more meetings of this nature that take place, the better documents will get.
Its called feedback.