The selection procedure for JEE Advanced examination involves the following steps:

1. Eligibility Criteria: The first step is to ensure that you meet the eligibility criteria set by the Indian Institutes of Technology (IITs), which is the conducting body of JEE Advanced examination. The eligibility criteria include qualifying JEE Main examination, age limit, number of attempts, etc.
2. Application: The next step is to fill and submit the online application form on the official website of IITs. You will need to provide personal details, educational qualifications, and other relevant information to complete the application process.
3. Admit Card: After the application process is complete, you will be able to download your admit card from the official website of IITs. The admit card contains important information such as your name, roll number, examination center, and the schedule of the examination.
4. Examination: The JEE Advanced examination is a computer-based examination that consists of two papers, Paper-1 and Paper-2. The examination consists of multiple-choice questions and numerical value questions.
5. Result: The result of JEE Advanced examination is usually declared within a few weeks after the examination. You will be able to check your result on the official website of IITs by entering your roll number.
6. Rank and All India Rank: Based on your performance in the JEE Advanced examination, you will be assigned a rank and an All India Rank. The All India Rank (AIR) is the national-level ranking, which is used for admission to IITs.
7. Counselling: After the declaration of JEE Advanced result, you will need to participate in the JEE Advanced counselling process to secure admission to your preferred IIT. The counselling process involves seat allocation, document verification, and fee payment.

It is important to note that the selection process may vary slightly from year to year and institute to institute. It is advisable to check the official website of IITs and the institute you are interested in for the latest information.