This TECHnote discusses alternative mechanical balancing and commissioning strategies. Balancing and commissioning have a significant impact on the performance and energy consumption of mechanical services. To be effective, balancing and commissioning aim to arrive at a reliable set of results reflecting the installed state of the mechanical systems. The issue is how best to make sure that this is achieved. Ultimately, success is dependent on the diligence, competence and facilities of the people undertaking the commissioning.