During the process of choosing a new product, the selection of those that are financially viable and economically profitable is crucial. It is essential to consider as important all the elements that influence the cost of a product. At this point of feasibility analysis, the role of process engineering is to analyze the manufacturing process and to predict, with maximum precision, the time required to manufacture a given product, since the manufacturing time directly influences the value of direct labor cost. The purpose of this research is to use MOST (Maynard Operations Sequence Technique), from Predetermined Motion Time System, to estimate the time required to manufacture a new product. This work, classified as an exploratory case study with qualitative and quantitative analyzes, was developed in a multinational industry of the audio sector located in the Manaus Industrial Pole. The analysis of the new product using image and/or sample served as the basis for the choice of assembly sequence, the first step to be developed for the use of MOST. Afterwards, the indices were applied for each activity performed during the manufacturing and finally the standard time of assembly of the product was calculated. The result of this research shows that through MOST it was possible to estimate the standard time of a new product and obtain the labor cost of R$1.82.