Examples may include coordination of steam turbine start permissives with GT/HRSG steam conditions, condenser vacuum permissives, gland steam and seal steam interfaces, lube oil and hydraulic oil auxiliary sequencing, turning gear controls, feedwater pump or condensate system permissives, boiler feed pump turbine interfaces, steam bypass and dump valve logic, HRSG drum level or feedwater control interfaces, desuperheater or attemperator spray controls, duct burner permissives, and plant runback or trip coordination. Provide diagnostic support through root cause analysis and recommend improvements to steam turbine control logic, software, hardware, instruments, actuators, HMIs, CPUs, communication networks, servo systems, control valves, stop valves, intercept valves, bypass or admission interfaces, protective functions, and related control interfaces.