What deliverability rate should you aim for when warming a new IP address?

My company has begun the process of warming up a new dedicated IP address today. We have worked with our Marketo rep to get this started. But I wanted clarification on what a "good" deliverability rate is during this process? Is there a threshold in which if we fall below a certain percentage we should be worried? We were just told to monitor bounces and delivery, but I just want to know what I am looking for in terms of deliverability rates to know if we are where we should be during this process.