SIMOPs (simultaneous operations) are described as the potential clash of activities which bring about an undersired event or set of circumstances; eg: safety, environment, damage to assests, scghedule, etc.
MOPO stands for "matric of permissible operations" that clearly lays out what activities are allowed to happen simultaneous in the sam area or same system. Its a spreadsheet.
Since we are having multiple construction fronts, a plan and matrix needs to be put together to mitigate any risks, hazards, clashing. etc
I hope this helps