Variation in Re-measurable contract

Hi All,

Please see the below scenarion;

In a re-measurable Contract, as per the scope document(signed by contractor) pump installation to be done, but it is missing in the BOQ. The Contractor didn;t include this item in the programme.

Later, during the Construction stage the Client raised this point and the Contractor requested for extension of time to install the pump, as it is not mentioned in the BOQ.

My stand on this is-    as it was mentioned in the scope document, it is the Contractor's responsibility to include this in the programme of works within the Contractual completion date. The Contractor is not entitled for any extension of time. As the rate is missing in the BOQ, the contractor can propose it and discuss/finalize with Client before installation.

All expert's point of view are welcome.

Best Regards

Kannan