The main purpose of this research article is to describe the methods of estimation of most frequently used nonlinear production functional model in econometric analysis namely COBB-DOUGLAS production functional model by using nonlinear method of estimation and logarithmic linear transformation. B. Mahaboob et al. in 2017(see [1]). In their research paper, in 2017, estimated the parameters of generalized COBB-DOUGLAS production functional model. In 2017, B. Venkateswarlu et al (see [2]). In their research article discussed the fitting of full COBB-DOUGLAS by solving goal programming problem. Shaiara Husain et al.in 2016 (see [4]), in their research study, found that COBB-DOUGLAS production function is applicable in the context of manufacturing sector and revealed an interesting aspect that this sector exhibits increasing returns to scale. © 2019 Author(s).