Integrating mechanisms are important in the effective use of the worldwide product divisional structure Direct contact between managers, liaison roles between departments , and both temporary task forces and permanent teams are examples of these mechanism. One researcher describes the use of these mechanisms in the worldwide structure. "There is extensive and formal use of task forces and operating committees t supplement communication and coordination of worldwide operations. The disadvantages of the global strategy / worldwide structure combination are the difficulty involved with coordinating decisions and actions across country borders and the inability to quickly respond to local needs and preferences.