We are the contractor on an NEC3 ECC Option A (priced contract with activity schedule) contract. Completion has been achieved and the defects date is 52 weeks after completion, a period we are now in. The project manager is currently issuing instructions to change the works information. These are additional works, but his assessment of the quotations is much lower than we have submitted. This is largely due to the fact we have left site and would incur considerable remobilisation costs to carry out these additional works, and the project manager is rejecting these mobilisation costs in his assessment. So, is the project manager correct in the assessments, and can we refuse to carry out any further works relating to post-completion instructions?
The compensation events for the instructions are assessed in exactly the same way as any other compensation event, that is based upon the forecast change in defined cost of carrying out the works that they cause, see clause 63.1.
It is not clear what you mean by ‘remobilisation costs’. If those forecast defined costs fall within the definition of defined cost, see clause 11.2(22), and the rules for calculating them are in the shorter schedule of cost components, then they are allowed in the assessment. Such costs are likely to be higher but that higher cost is allowed in principle.
For example, if you need a member of staff to visit site to supervise them then the defined cost will be increased and therefore allowed under people, whereas if that member of staff was already on site during the project, it would not have been.