The present book is the outcome of the research work carried out by the main author in the form of PhD work under the supervision of the co-author. The book consists of seven chapters followed by a bibliography. Sufficient review of the concerned literature has been done. A generalized gamma type model has been proposed and its statistical analysis has been carried out with its various characteristics. The proposed model is useful for the analysis of life time data related to engineering, medical and bio-medical sciences. Several applications of the proposed model have been outlined. The book includes Bayes estimation of the parameters of the proposed model, reliability and hazard rate functions and some tests of significance regarding the parameters. A mixture model has also been developed from the proposed model and some of its characteristics have been investigated. The present book may be useful for the researchers working in life testing.