I was working on my class project; at the beginning, I had to estimate project cost. I calculated the total project budget should not cost more than $90. However, by the time I finished my project, it ended up cost me 40$ more than I estimated due to some defective motors which needed to be reordered and replaced. By the deadline, I only completed 80% and earned value was $72 and actual cost was $130. My cost variance for that project was -58 which shows I spent more than I originally predicted and based on negative number my project was over budget “not a good sign”.