title,doi,url,abstract,journal,publication_year,pmid,arxiv Effort Estimation Techniques - A Review, https://doi.org/10.32628/IJSRCSEIT, https://ijsrcseit.com/CSEIT1833677, Software Effort Estimation has always been an ongoing challenge to software engineers as testing is one of most critical activities of SDLC. Now-a-days accurate & reliable effort estimation is the need of software companies. There are various models and techniques used to estimate the software project effort. However due to some factors or causes they are unable to give accurate results. So this paper act as torchbearer to various questions related to factors importance of estimation problem faced by estimation techniques guidelines etc. of effort estimation. In this paper we also summarized existing techniques that used for effort estimation., International Journal of Scientific Research in Computer Science Engineering and Information Technology, 2018, CSEIT1833677