Background: In high-performance sport, the support provided by sport scientists and other staff can be a valuable resource for coaches and athletes. Purpose: We propose and detail here the approach of “minimal, adequate, and accurate” sport-science support to ensure that programs of work and solutions are both economical and effective. Methods: Our support provision advocates for utilization of “minimal” resources (employing the least amount of time, tools, and funding) necessary to achieve the desired outcomes. We strive for “adequate” information that fulfills specific objectives without excess and with the requirement that methods and data used are “accurate” (valid and reliable). To illustrate the principles of this approach, we outline a real-world example of supporting 100-m track (athletics) sprinters preparing and competing in an international competition. The provision of performance support emphasizes an integrated approach, combining knowledge and insights from multiple sport-science disciplines. The key facets managed under this approach are (1) neuromuscular readiness, (2) wellness monitoring, (3) movement observation, (4) motivation, (5) biomechanics and performance analysis, and (6) qualitative feedback. These facets are based on the specific performance determinants and influencing factors of an event (100-m dash). Conclusions: Application of this quantitative and qualitative approach can enhance the ability to make informed decisions. Nevertheless, the approach must be planned, evaluated, and refined on a regular basis to enable effective decision making in sport-science support. The 3-element approach of “minimal, adequate, and accurate” should be codesigned and supported by the athletes, coaches, and staff to ensure successful implementation.