This is an individual chapter of Theory of Constraints Handbook. The purpose of this chapter is to suggest methods that TOC can be made use of to deal with problems of complicated companies. We start by offering a meaning of complexity then explain the core dispute of complicated companies, which we believe arise from the requirement for both consistent growth and organizational stability. The issue complex companies deal with is coordination of lots of independent devices that are all trying to make best use of regional procedures. We suggest a vital injection âEUR" âEUR Everyone in the company who has a significant influence on Throughput is determined by Throughput Dollar Days (TDD) âEUR" and show how TDD and other TOC Supply Chain procedures can be made use of in complicated companies to create an effective approach of coordination in between independent devices and offer senior management new understanding and higher ability to handle such companies.