Promotion thesis “Application of Pareto Principle in Engineering Product Design and Design Assessment” is dedicated to the development of an innovative object method in order to facilitate the creation process of new innovative engineering products and the evaluation of their design. For this purpose mathematical object analyses, optimisation and synthesis methods are improved, complementing them with Pareto and Fuzzy Management elements. In Chapter One a survey of literature regarding the role of design in engineering solutions is carried out. The significance of design in Latvian enterprises, as well as obstacles for the development of new products in Latvia are ascertained. A positive example of object designing is considered. Chapter Two shows that in developing new products not only the innovative nature of products, but also technological possibilities of manufacturers should be taken into account. The materials obtained from the survey of literature show that very many methodologies have been developed in the world, which may be used as guidance in evaluating a design object. The following is commented upon and discussed in Chapter Three: fuzzy design method, its algorithms, decision-making theory and aspects, tasks of real object analysis and synthesis including factor analysis. In Chapter Four methodology for the evaluation of commercial transport automobiles is developed on the basis of statistical data base, which does not necessitate expert mistakes in determining prices. It is shown that Fuzzy curves coincide well with the conditions of Pareto boundary. In Chapter Five methodology for the performance of an expert-examination of automobiles from the point of view of buyer, using data base of PC Crash automobiles, is developed. Mathematical evaluation (ranking), using rating, is applied. In Chapter Six a new methodology is developed, using Fuzzy Management elements, which may be used for synthesis of management of different transport system types in actual road situations. In Chapter Seven a new method for optimization of object form is developed, applying discrete parameters of form. First results in automotive vehicle gage panel (GP) modelling and optimization of the component form are obtained. Different solutions for the design of dashboard are offered. Conclusions regarding high efficiency of the developed methods are drawn.