In any action where the parenting plan is at issue because the parents are unable to agree, the court may order a social investigation. The investigation is a study concerning all pertinent details relating to the child and parent. The agency or persons conducting an investigation and study ordered by the court, furnish the court and all parties of record in the proceeding a written study containing recommendations. The recommendations include a written statement of facts found in the social investigation, upon which the recommendations are based. The court may consider the information contained in the study in making a decision on the parenting plan.