This document discusses advanced control loop strategies including multivariable loops, feedforward control, cascade control, ratio control, batch control, and selective control. It was presented by Dr. S. Meenatchisundaram for the Process Instrumentation and Control course at MIT Manipal. Examples are provided for each control strategy and it is explained that factors like outside disturbances must be accounted for in combined feedforward and feedback systems. Tuning of primary and secondary loops is also addressed.