摘要:Tanzania suffers problems of cost and time overruns in the construction business. Many factors are contributing to the cost and time overruns in Tanzania construction projects. There are many publications in different countries about cost and time overruns in construction projects, these publications show that the problem of overruns varies from country to country. This variation gives the idea that even in Tanzania there is a need for researches concerning cost and time overruns. Some researchers worked on the problems of cost and time issues in Tanzania but narrowing only on the identification of factors. This study used the survey to identify the frequent factors in Tanzania and the quantitative assessment of the completed projects to quantify the influence of each factor contributing to cost and time overruns. To come up with the results shows the extent influence of each factor in overruns in expected in this research and it will be the key pillar in construction management to fight against overruns.