I am the only HR in my company. There's an employee A who has joined almost 4 months back. But it's been 4 months and he is a very slow learner like we are a production company in chandigarh and we are having a TAT for whatever work we are getting from clients. Employee A is very slow in production and we have given him several chances (verbal and written warnings both) for him to improve but there is no improvement at all. Also he is an introvert he hardly speaks with anyone or discuss his issues so I don't want to go with termination. Can anyone please help me with any activity or what step should I take to tackle this situation?