Subject(s): Mahalanobis, P. C. in (Prasanta Chandra), in 1893-1972. -- Economic development in Mathematical models. -- India in Economic policy. -- Economic ideas of P C mahalanobis : Indian plan models before Mahalanobis model, Feldman's effect on Mahalanobis -- Critical assessment of mahalnobis model by some prominent personalities/ group of personalities : Evaluation of the model by panel of economists, different school of thought among panel of economists, critical evaluation of the model in NDC Neogy's dissent, critical evaluation of the model in Lok Sabha and cabinet, R.Komiya's approach, Raj-sen approach, D R Gadgil's approach, Gautam mathur's approach, S Chakravarty's approach, P.C joshi's approach, Rangaswami and Somasekhara's approach, Vakil-Brahmananada's evaluation, comparative analysis of mahalanobis model with Vakil-Brahmananda's model -- Relevance of Mahalanobis ideas/model in present context : brief assessment of post second plan contribution, Indian economy