How many chances should I give a new employee to get on the ball at work?

The key is to communicate with them and be willing to help.

Depends on the position & the employee, how good they are at their job, their conduct, how they interact with others. Also need to know why they may not be "on the ball," reason for not performing their best. Could be many things going on from physical issues, to mental stress, outside factors.

New jobs are hard. To expect a new employee to immediately succeed at everything isn't realistic. Co - workers, veterans in mentoring roles and supervisors should be there to guide them. If they are repeating mistakes or making critical mistakes, 2 is the limit, but normal everyday, getting used to the job things could take up to a year, longer if there are frequent changes or updates. So I would consider it a probationary stage until the end of the first year and grant leniency.

I’m a pretty firm believer in “three strikes your out” as long as those three strikes are documented I don’t usually go farther than that unless I have no other choice. Make sure you document everything!

Countless as long as you see that there is good change/improvement

Three. One with a redirect, two for a warning, three you're out.

It depends on the length of time for each "chance" and if you're explicitly clearly communicating your expectations, possibly in writing.

3 strikes

3. First identify the function of the issue and provide feedback and coaching; if they continue to under-perform have another conversation to determine why & what, if anything, can be adjusted; and if they still under-perform change their position or let them go.

I don't think this is the right way to think about the problem. If you have a member of your staff with a performance issue, you should try and work with that person to help them understand the gap and put together a plan to get quickly back on track. Try and optimize for fast feedback and set appropriate constraints in terms of how quickly and completely you need the change to be. If they're not making progress and it's clear they're not going to be able to do so within those constraints, you should then have a conversation with them about finding a position that's a better fit for them. In general, try to be generative and collaborate on excellence, rather than try and take an authoritarian position without providing useful feedback.

As many chances as it takes.

This question is too ambiguous to answer. What is meant by “get on the ball”? How much trains was provided? We’re clear expectations set with said employee? What is their experience level? The answers to all of these will inform the answer.

3 strikes you are out