Rules applicable for Termination of worker?

Hi, Need to terminate one worker , who is on company roll . he has gone tool slow in his work- finding it impossible to continue with him.
Wanted to understand what are the rule applicable on us while terminating a worker?
1) How much do we need to pay him?
2) Do we need to inform Labour office that we are doing this?
3) Do we need to take their permission??
4) Are these rules different for companies employing 100 workers or 500 workers or 1000 workers etc?

Terminating the worker is a serious affair. you have to conduct the inquiry and prove him guilty then only you can terminate him. But, before that did you issue warning letters to him about his work. there is a procedure you have to follow. terminating someone requires strong reason and equal chance for explanation. Its not good to snatch someone's bread & butter, morally as well as legally.

Thanks.
Awaiting more inputs and contribution regarding the subject.

Dear Jeevika you have not mentioned the vital details of do you have Certified Standing Orders or Service Rules? Is there Termination clause in your Appointment letter? Whether Employee in question comes under the definition of Workman as per ID Act?

Terminating services of an employee for going too slow will be possible if you have built records of his being too slow & shared the same with him / her. Terminating an employee for 'going too slow' without any history may cause you legal problems if the employee raises the issue with labour authorities. Exert caution!
It is a long drawn process for terminating an employee for such reason if it is consistently displayed. Whether you like it or not this the reality.