How to choose between PLC and DCS Systems ? Instrumentation Tools

How to choose between PLC and DCS Systems ? Instrumentation Tools: The following steps discuss about How to choose PLC or DCS systems ? Step 1: Does the process require implementation of advanced process control (APC)? No doubt, the vast majority of process control applications can be handled sufficiently with traditional regulatory control using proportional-integral-derivative (PID) technique, or by combining it with other traditional regulatory control functions, ...