This paper is a review of plantwide control, presenting both an introductory view for those new to the subject and also summarizing recent advances for those familiar with it. Previous reviews have been studied, summarized, and updated with new publications in the area. The major advances since the beginning of its formal studies are described, with highlighting of the Most noticeable contributions. Plantwide control architectures, design techniques, and some important open research topics are addressed. Additionally, noteworthy literature and benchmarks are enumerated.