Whenever possible it is much better for everyone involved, especially the child, if parents can work together to reach an agreement. Although you will need the court’s approval in most cases, you will achieve most desirable outcome if the two of you can present the court with a plan you have designed together.
If the court decides for you, because you cannot agree to terms, you are far more likely to find yourself in a situation where no one is happy.
A child custody attorney can help you work together to create a parenting plan that works for everyone and will satisfy the court.