10 MOD rejected relocating its Head Office either elsewhere in London or on a greenfield site because of the cost of moving the Defence Crisis Management Centre (DCMC), and the need for Ministers to remain at the heart of Whitehall. Potential problems in operating the DCMC and anticipated planning permission objections to Main Building given its grade 1 listing also led it to reject demolition and rebuild options. MOD rejected a 'do minimum' option of refurbishing Main Building's systems because of its poor physical state. In addition, this option would not have given the required working environment and rationalisation benefits. A PFI procurement was chosen because MOD thought it could achieve savings with strong incentives for the contractor to complete on time and without varying the cost to MOD.