The recognised systems for job grading are Basys and Hay.
The classification of the jobs in the different job groups, as described in Article 6.9, is based on the job grading in accordance with Basys. Your job has been or will be classified in one of the job groups.
Your employer is however free to use a different method for job grading providing the method can be correlated to one of the above-mentioned systems for job grading. The CLA parties test this and establish whether this provision is met.