This study assesses the effect of team composition on decision schemes, perceived complexity, and external information search conducted during team problem‐solving processes. The study draws on a systematic review of relevant literature in group psychology, organization behavior, and marketing science, and it is followed by a quasi‐experimental study for verification of the propositions. The independent variable chosen is team composition: teams are classified into “experienced”; teams and “inexperienced”; teams. The intervening variables are external information search, decision schemes, and perceived complexity. The study has implications for team decision support system design.