UPSC or SSC exams surely has some questions on India's five year plans because the economy of India is based in part on planning through its five-year plans. The planning commision develops susch five year plans. The eleventh plan is currently underway. Prior to the fourth plan, the allocation of state resources was based on schematic patterns rather than a transparent and objective mechanism, which led to the adoption of the Gadgil formula in 1969. Revised versions of the formula have been used since then to determine the allocation of central assistance for state plans.