"The need for coordination has two basic causes: the various members (e.g., production units) are competing for a common pool of resources, financial and material; and different decisions complement or substitute for each other. For both reasons, the effectiveness of decisions made by one participant is influenced by the decisions of another. With limitations on the flow of information, the decisions themselves cannot be coordinated. That would require transferring all the information available, precisely what is to be avoided. It has been emphasized earlier that when information will be available, the individual should choose a decision function, a policy or strategy that determines what his actual decision should be for each possible signal he receives. Hence, ideally, in an organization there should be prior agreement on decision functions or strategies for all participants."