At Babasaheb Bhimrao Ambedkar University (BBAU) in Lucknow, the option for branch transfer or upgradation after the first year of B.Tech is generally available, subject to certain conditions. However, this process is competitive and depends on a few key factors:

1. **Academic Performance**: Your performance in the first year, particularly your CGPA or SGPA, plays a crucial role in determining your eligibility for a branch transfer. Typically, students with higher grades are given priority.

2. **Seat Availability**: Branch transfer is only possible if there are vacant seats in the desired branch. If the branch you wish to transfer to is already filled, your chances may be limited.

3. **University Policies**: BBAU, like other universities, has specific guidelines and deadlines for applying for a branch transfer. These rules can vary year by year, so it’s important to check the latest guidelines from the university.

4. **Approval Process**: The final decision is usually made by a committee based on your application, academic performance, and seat availability.

If you're considering a branch transfer or upgradation, it's advisable to consult the academic office at BBAU early in your second year to understand the specific criteria and process.