A cost estimation
Not all of the project that I had from engineering was easy, there are some where I face problems and difficulty, especially when it comes to estimation. But when I had found out that there is software estimation available online, I did not hesitate to use it. But of course I spend time on reading and researching more about the estimation and the should cost modeling. Because my work is too important to me I do not want any mistakes to come. Even if I cannot promise a project to be always perfect I wanted to make sure that the project are properly estimated.