Most models of best fit focus on ways to achieve external fit. The most influential model of external fit is that from Schuler and Jackson (1987) which argues that business performance will improve if their HR practices support their choice of competitive strategy: cost leadership, quality enhancement and innovation. Under this model, organizations need to work out the required employee behaviors to implement a chosen competitive strategy and devise supporting HR practices to enable those behaviors to be encouraged in the workforce. Vertical integration can be explicitly demonstrated through the linking of a business goal to individual objective setting, to the measurement and rewarding of attainment of that business goal.