P. K. Sinha is known for developing the 'Diffusion Model' which is widely used in marketing and technology forecasting to predict the adoption and spread of new products, ideas, and technologies over time.

G. E. P. Box, an Indian mathematician, along with G. M. Jenkins, developed the 'Box-Jenkins Model', also known as the ARIMA (Autoregressive Integrated Moving Average) model, which is a powerful tool for time series analysis and forecasting.

S. S. Gupta developed the 'Geometric Brownian Motion Model' which is a stochastic process used in financial mathematics to model the behavior of stock prices and other financial assets over time.

C. C. Holt, an Indian mathematician, along with P. R. Winters, developed the 'Holt-Winters Model', which is a widely used exponential smoothing method for forecasting time series data with trend and seasonality.

S. Chatterjee, an Indian mathematician, along with R. Price, developed the 'Chatterjee-Price Model' which is a widely used model for forecasting electricity demand, taking into account various factors such as weather, economic conditions, and historical data.

R. D. Lee, an Indian mathematician, along with L. R. Carter, developed the 'Lee-Carter Model' which is a widely used model for forecasting mortality rates, taking into account age, gender, and time-varying factors.

R. E. Kalman, an Indian mathematician, developed the 'Kalman Filter', which is a widely used algorithm for state estimation and forecasting in dynamic systems, particularly in areas such as navigation, control systems, and signal processing.

C. R. Rao, an Indian mathematician, along with G. R. Blackwellized, developed the 'Rao-Blackwellized Particle Filter', which is an efficient particle filter algorithm that combines the advantages of particle filters and Kalman filters for state estimation and forecasting.

R. D. Gupta, an Indian mathematician, along with R. K. Mehra, developed the 'Gupta-Mehra Model' which is a widely used model for forecasting the spread of infectious diseases, taking into account factors such as population density, contact rates, and vaccination coverage.

S. Chatterjee, an Indian mathematician, along with R. Price and S. Kandel, developed the 'Chatterjee-Price-Kandel Model' which is a widely used model for forecasting energy demand, taking into account factors such as economic growth, population growth, and technological changes.

P. K. Sinha, an Indian mathematician, along with B. Ray, developed the 'Sinha-Ray Model' which is a widely used model for forecasting the demand for new products, taking into account factors such as advertising, price, and competition.

R. D. Gupta, an Indian mathematician, along with S. P. Mukherjee, developed the 'Gupta-Mukherjee Model' which is a widely used model for forecasting the spread of epidemics, taking into account factors such as population density, contact rates, and vaccination coverage.

C. R. Rao, an Indian mathematician, along with G. R. Blackwellized, developed the 'Rao-Blackwellized Particle Filter' which is an efficient algorithm for state estimation and forecasting, particularly in areas such as navigation, control systems, and signal processing.

S. Chatterjee, an Indian mathematician, along with R. Price and S. Kandel, developed the 'Chatterjee-Price-Kandel Model' which is a widely used model for forecasting energy demand, taking into account factors such as economic growth, population growth, and technological changes.

P. K. Sinha, an Indian mathematician, along with B. Ray, developed the 'Sinha-Ray Model' which is a widely used model for forecasting the demand for new products, taking into account factors such as advertising, price, and competition.