Indiana - State Divorce Laws
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Direct quotes from the Indiana Child Support Guidelines.

Support Guideline 6. Additional Commentary
 Additional Commentary is offered to assist courts, practitioners and litigants in the application of the guidelines. 

Commentary   Page 28
“Split or Joint Custody. The Child Support Guidelines worksheet does not address the problem of establishing a support order in split or joint custody situations.  Infinite possibilities exit in terms of time spent with each parent, travel between parents, and other considerations.  The Guidelines are based on the economic assumption that the children live in one household only.”

  
"In addition to the economic aspects of visitation, a high value should be placed on visitation between the child(ren) and the noncustodial parent.  In the vast majority of cases, maintaining a close relationship and frequent contact between the child(ren) and both parties is recognized as being in the best interest of the child.  Therefore, courts should consider deviation form the Guidelines when it will encourage visitation."

Flexibility Versus the Rebuttable Presumption   Page 8
2.        “Situations Calling for Deviation. An infinite number of situations may prompt a judge from the Guideline amount.  For illustration only, not as a complete list, the following examples are offered:”
·        “The noncustodial parent purchases school clothes.”
·         “The noncustodial parent has extraordinary medical expenses for himself or herself.”
·         “The children spend substantially more time with the noncustodial parent than in the average case.”
·         “One of the parties is required to travel an unusually long distance in the course of employment on a regular or daily basis and incurs an unusually large expense for such travel.”