Supportability engineering is a specialized discipline within systems engineering focused on designing systems and products for optimal ease of maintenance, repair, and logistical support throughout their entire operational lifecycle. It is a methodological approach that investigates the factors influencing system availability, reliability, and the cost-effectiveness of support infrastructure. This field encompasses the integration of support considerations into the initial design phase, analysis of component accessibility and maintenance task complexity, and planning for resource provisioning (e.g., spare parts), with the primary objective of ensuring comprehensive, affordable, and effective lifecycle support and minimizing total ownership costs.