ChaRM retrofit and cutover queries during maintenance

Hi All,

Below is the SAP landscape using the ChaRM for implementation and maintenance landscape.

we are currently doing retrofit and cutover for the same.

Basis team planning to down the Pre-PRD for 1 month maintenance ,but customer looking the transport movement using ChaRM except Pre-PRD during the maintenance.

Just i am thinking whether i can close  the maintenance cycle and create new transport route between imp- QAS and Maint - Dev or any other way to fit this requirement.

Please suggest the best practice to use the ChaRM for this scenario for one month.

Rg,

Karthik