Dear Kumar,
Firstly, I would like to inform you about a new practice being implemented in organizations. I recently joined a new organization where we have a biometric thumb reader. This thumb reader is directly connected to the PC at the reception. With the help of this device, there is no need to register attendance manually as the PC will continuously save the data.
If the number of employees is between 50-100, then it is feasible to maintain this system. However, if the number of employees exceeds 100, then biometric machines are the best option.
Regards,
Hassan