Many modern products, such as automobiles and aircraft, contain highly sophisticated electrical and electronic (E/E) systems. Yet despite the importance and technical challenges of E/E systems development, proprietary in-house software tools are still widely used for tasks such as data network verification, wire harness manufacturing engineering, and after-sales diagnostics. In contrast, adjacent tasks such as printed circuit board design and mechanical CAD are almost always undertaken using commercial-off-the-shelf (COTS) tools provided by specialized vendors. This webinar examines why this is the case, the maturity of COTS E/E systems development tools, and the factors relevant to make-or-buy decisions in this domain.