The main problem for the managers is to find ways to control dependency relations in the external environment. There are various strategies to manage dependency relations with the actors in the external environment: a. Acquisition of suppliers. b. Developing long term contracts with the critical suppliers. c. Interlocking directorates – to assign some members of board of directors to the supplier firms’ boards. d. Founding joint ventures with the critical firms in terms of resource flow. e. Joining trade associations. f. Lobbying.