The Eleventh National Economic and Social Development Plans develop from the First through the Seventh Plans resulted in notable improvements to the national economy, but led to unsustainable development and negative consequences for society. These problems brought about adjustments to the process by which the Eighth Plan was formulated so it would focus simultaneously on both economic development and human and social advancement. The Eleventh Plan will continue to implement the key elements of the “Philosophy of Sufficiency Economy.” It will place “people at the center of development,” and promote “balanced development” in all aspects.