Hi we are doing post tensioning works for a commercial complex...The total agreed price for completing the work was 50 million.Totally there are 4 buildings one food court and one podium area where the works needs to be executed..For podium area foodcourt and other 2 buildings we have successfully carried out the work..For the other 2 buildings we had received a letter from the client stating that they wanted to execute the works with flat slab without post tensioning.Which is actually a reduction in scope of work.Actually we havent started the works for those 2 buildings...General criteria for using Post tensioning is to reduce the over all cost incurred by traditional method...Now if we execute the work by normal design without post tensioning the cost incurred will be more...There is a seperate clause in CoC which clearly states that the employer shall give notice in writing to that effect to the contractor and the contractor shall have no claim of whatsoever nature consequent to abandoning and thus resulting in foreclosure of the whole or part of works.Upon such intimation this contract shall stand cancelled and terminated..What are the additional clauses which has to be given importance..and supporting documents which i need to attach along with the claim document...I am very new to claim analysis kindly advice