Abstract
Cost estimation process becomes a crucial factor in any software development project. There are many previous researches discussed the success factors that influence in software development project. This paper aimed to discuss factors that influences to the successful of cost estimation process in software development project. Literature survey is carried out from the past researches. Then, this paper presents the success factors that bring to the effectiveness of cost estimation in software development project. From the review, a conceptual model was developed to show the influence factors in cost estimation process. Realisation these factors will help software development communities contribute positively to the success of cost estimation process in software development project.