Shangeeth, some of the factors which are used in the making of TNEA 2018 cut-off are:

• The difficulty level of the qualifying exam
• Number of seats available in each B.Tech programme and the participating institutes
• Number of candidates who have applied for admission
• Previous years cutoff trends

You can check the previous year TNEA cut-off trends of all the branches with the following link:

• https://engineering.careers360.com/articles/tnea-cutoff

Feel free to ask if you have any more queries. All the best!!